ROOT & REIGNCitations · rootandreign.co/citations · printed 2026-09-28
CitationsEvery claim ROOT & REIGN makes, and its source
Check us against the evidence.
107 claims · 126 studies · 8 references
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By concern
acne bodybarrier repairdry feetdry handseczema psoriasisfine linesfitzpatrickhair breakagehyperpigmentationintimate areamakeuppost acnerazor bumpsskin of colorsqueaky cleansun protectionsweatwound care
By ingredient
Concern6 claims · 6 studies
acne body
C35-5
Acne = loss of C. acnes phylotype balance + dysbiosis, not hyperproliferation; antibiotics induce dysbiosis.
VerifiedOne source behind this claim
The record
The Skin Microbiome: A New Actor in Inflammatory Acne.
C35-8
BP vehicle irritancy (surfactants/preservatives/alcohols); low-% formula without them well-tolerated.
VerifiedOne source behind this claim
The record
A New, Once-daily, Optimized, Fixed Combination of Clindamycin Phosphate 1.2% and Low-concentration Benzoyl Peroxide 2.5% Gel for the Treatment of Moderate-to-Severe Acne.
C35-9
Azelaic acid — 4 mechanisms (antimicrobial, tyrosinase inhibition, free-radical scavenging, reduced neutrophil ROS).
VerifiedOne source behind this claim
The record
The multiple uses of azelaic acid in dermatology: mechanism of action, preparations, and potential therapeutic applications.
C35-10
Azelaic acid also keratolytic.
VerifiedOne source behind this claim
The record
Azelaic acid gel 15%: clinical versatility in the treatment of rosacea.
C35-11
Azelaic acid probably less effective than benzoyl peroxide on PGA (Cochrane RR 0.82).
VerifiedOne source behind this claim
The record
Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne.
C35-15
Hidradenitis suppurativa >3x more prevalent in Black vs White; more severe, longer diagnostic delay.
VerifiedOne source behind this claim
The record
Exploring the Experience of Black Americans Living with Hidradenitis Suppurativa in the United States Healthcare System: A Narrative Review.
Concern5 claims · 6 studies
barrier repair
C5-1
Hard water dramatically increases barrier damage from surfactant cleansers — calcium/magnesium ions bind to surfactants and remain on skin after rinsing.
VerifiedOne source behind this claim
The record
The Effect of Water Hardness on Surfactant Deposition after Washing and Subsequent Skin Irritation in Atopic Dermatitis Patients and Healthy Control Subjects.
C5-2
Skin surface pH averages ~4.7-5.5; acidic pH keeps resident flora attached, alkaline disperses it; below-5 skin is in better barrier condition.
VerifiedOne source behind this claim
The record
Natural skin surface pH is on average below 5, which is beneficial for its resident flora.
C25-1
Ambient humidity and temperature strongly affect the stratum corneum; colder/drier regions show markedly higher population-level dry-skin burden than warm/humid ones.
VerifiedOne of 2 sources behind this claim · see the other
The record
Climate, Humidity, and Population-Level Interest in Dry Skin: Infodemiology Analysis Using Google Trends Across the United States.
VerifiedOne of 2 sources behind this claim · see the other
The record
Ambient humidity and the skin: the impact of air humidity in healthy and diseased states.
C25-2
Humectants (urea, glycerol) increase stratum-corneum hydration; occlusives reduce water loss by sealing the surface.
VerifiedOne source behind this claim
The record
Effects of water activity and low molecular weight humectants on skin permeability and hydration dynamics - a double-blind, randomized and controlled study.
C27-2
Skin's acidic pH supports barrier repair and antimicrobial defense; pH stays raised for hours after even a single wash.
VerifiedOne source behind this claim
The record
The Relation of pH and Skin Cleansing
Concern1 claim · 1 study
dry feet
C28-1
A fragrance-free barrier-repair cream with hyaluronic acid healed pedal fissures as effectively as urea 40% in a double-blind RCT (n=48), without the burning/irritation salicylic-acid formulas can cause.
VerifiedOne source behind this claim
The record
Comparative Efficacy of Novel Skin Barrier Repair Cream and Urea 40% for the Management of Pedal Fissures
Concern3 claims · 3 studies
dry hands
C27-2
Skin's acidic pH supports barrier repair and antimicrobial defense; pH stays raised for hours after even a single wash.
VerifiedOne source behind this claim
The record
The Relation of pH and Skin Cleansing
C27-3
Surfactants remove not just grease and dirt but also corneocytes, lipids, and proteins; repeated over-exposure causes irritant dermatitis.
VerifiedOne source behind this claim
The record
Surfactants and the skin
C27-4
Management of hand-hygiene-driven irritant contact dermatitis is choosing less-irritating products plus frequent moisturizer, not washing less.
VerifiedOne source behind this claim
The record
Contact Dermatitis from Hand Hygiene Practices in the COVID-19 Pandemic.
Concern9 claims · 9 studies
eczema psoriasis
C31-1
Eczema in skin of color shows greater extensor involvement, dyspigmentation, and papular/lichenified presentations; erythema is harder to appreciate, leading to underestimation of disease severity.
VerifiedOne source behind this claim
The record
Diagnosing Atopic Dermatitis in Skin of Color.
C31-2
Eczema in skin of color may appear psoriasiform, lichenoid, scaly or papular with a violaceous color, with higher prevalence of PIH than White patients.
VerifiedOne source behind this claim
The record
Atopic dermatitis in skin of colour. Part 2: considerations in clinical presentation and treatment options.
C31-3
Higher prevalence, persistence, and severity of atopic dermatitis in skin-of-color populations; erythema assessment can underscore severity; greater risk of nodularity and hyper/hypopigmentation.
VerifiedOne source behind this claim
The record
Managing Atopic Dermatitis in Patients With Skin of Color.
C31-4
Black children are at roughly six times greater risk for severe atopic dermatitis than white children.
VerifiedOne source behind this claim
The record
Atopic dermatitis in adolescents with skin of color.
C31-5
Pigmentary sequelae (hyper-, hypo-, depigmentation) are a distinct feature of atopic dermatitis in skin of color; xerosis is more visible in melanin-rich skin.
VerifiedOne source behind this claim
The record
Insights in Skin of Color Patients With Atopic Dermatitis and the Role of Skincare in Improving Outcomes.
C31-6
In psoriasis on skin of color, erythema is often less apparent, plaques may appear violaceous or dark brown; delayed diagnosis, greater biopsy reliance, reduced diagnostic accuracy; greater body-surface involvement, thicker scale; PIH can persist for years after resolution.
VerifiedOne source behind this claim
The record
Psoriasis in skin of color: clinical presentation, diagnostic challenges, and therapeutic considerations.
C31-7
Plaque psoriasis prevalence is lower in people with skin of color but tends to be more severe; less likely to receive biologic treatment; worse quality-of-life impact.
VerifiedOne source behind this claim
The record
Psoriasis in People With Skin of Color: An Evidence-Based Update.
C31-9
Black skin shows increased transepidermal water loss, decreased ceramide levels, and lower stratum corneum pH; management emphasizes low-pH products and emollients.
VerifiedOne source behind this claim
The record
Pruritus in Black Skin: Unique Molecular Characteristics and Clinical Features.
C31-10
African American skin is characterized by low ceramide levels and high protein cohesion in the uppermost stratum corneum, interpreted in relation to the high prevalence of xerosis.
VerifiedOne source behind this claim
The record
Structural and functional differences in barrier properties of African American, Caucasian and East Asian skin.
Concern5 claims · 6 studies
fine lines
C15-1
Fitzpatrick VI skin has a natural SPF equivalent of approximately 13.
VerifiedOne source behind this claim
The record
A Comprehensive Review of the Role of UV Radiation in Photoaging Processes Between Different Types of Skin.
C21-2
Topical retinoids increase collagen and normalize keratinocytes/melanocytes, improving wrinkles, texture, and tone.
VerifiedOne of 2 sources behind this claim · see the other
The record
Topical Treatments for Photoaged Skin.
VerifiedOne of 2 sources behind this claim · see the other
The record
Topical tretinoin for treating photoaging: A systematic review of randomized controlled trials.
C22-1
Thicker/more compact dermis on skin of color makes facial lines less noticeable; higher epidermal melanin makes darker skin more vulnerable to dyspigmentation with age.
VerifiedOne source behind this claim
The record
Aging Differences in Ethnic Skin.
C22-2
Photoaging from cumulative UV exposure is the greatest contributing factor to visible facial aging.
VerifiedOne source behind this claim
The record
Topical Treatments for Photoaged Skin.
C22-3
Topical retinoids build collagen; on skin of color the gentlest effective strength avoids irritation-triggered PIH.
VerifiedOne of 4 sources behind this claim · see the others
The record
Topical Treatments for Photoaged Skin.
VerifiedOne of 4 sources behind this claim · see the others
The record
Topical tretinoin for treating photoaging: A systematic review of randomized controlled trials.
VerifiedOne of 4 sources behind this claim · see the others
The record
Acne in ethnic skin: special considerations for therapy.
VerifiedOne of 4 sources behind this claim · see the others
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
Concern1 claim · 3 studies
fitzpatrick
CFITZ-1
The Fitzpatrick scale (developed 1975 by Thomas Fitzpatrick) classifies UV response, not appearance; Types I-VI run from always-burns/never-tans to never-burns/tans-deeply; higher melanin density means higher PIH risk, not more protection; product concentrations formulated/tested on Fitzpatrick I-III can inflame IV-VI skin.
VerifiedOne of 3 sources behind this claim · see the others
The record
The validity and practicality of sun-reactive skin types I through VI.
VerifiedOne of 3 sources behind this claim · see the others
The record
Are the Fitzpatrick Skin Phototypes Valid for Cancer Risk Assessment in a Racially and Ethnically Diverse Sample of Women?
VerifiedOne of 3 sources behind this claim · see the others
The record
Postinflammatory hyperpigmentation: etiologic and therapeutic considerations.
Concern4 claims · 7 studies
hair breakage
C17-1
Curl arises from asymmetric cell differentiation in the hair root, producing an elliptical cortex; mechanism structurally the same across ethnic origin, more pronounced in coily hair.
VerifiedOne source behind this claim
The record
Human hair keratin network and curvature.
C17-2
African/African-diaspora scalp hair is significantly more curled on average than European or East Asian hair.
VerifiedOne source behind this claim
The record
Quantifying variation in human scalp hair fiber shape and pigmentation.
C17-4
Coily/African-type hair shows lower water sorption and distinct cuticle lipid structure vs straighter hair; fragility best attributed to knotting/crack formation rather than cross-sectional shape alone.
VerifiedOne of 3 sources behind this claim · see the others
The record
How different is human hair? A critical appraisal of the reported differences in global hair fibre characteristics and properties towards defining a more relevant framework for hair type classification.
VerifiedOne of 3 sources behind this claim · see the others
The record
Ethnic hair: Thermoanalytical and spectroscopic differences.
VerifiedOne of 3 sources behind this claim · see the others
The record
External lipid function in ethnic hairs.
C17-5
Coconut oil (unlike mineral or sunflower oil) penetrates the hair shaft, measurably reduces protein loss from grooming, correlates with lower Hair Breakage Index.
VerifiedOne of 2 sources behind this claim · see the other
The record
Effect of mineral oil, sunflower oil, and coconut oil on prevention of hair damage.
VerifiedOne of 2 sources behind this claim · see the other
The record
Hair breakage index: an alternative tool for damage assessment of human hair.
Concern23 claims · 27 studies
hyperpigmentation
C2-1
Oral tranexamic acid 250mg twice daily for 3 months produced a 49% mMASI reduction vs 18% placebo.
VerifiedOne source behind this claim
The record
Randomized, placebo-controlled, double-blind study of oral tranexamic acid in the treatment of moderate-to-severe melasma.
C3-1
2-5% niacinamide produced statistically significant melanin-density reduction over 4-8 weeks (35-68% melanosome-transfer inhibition in coculture).
VerifiedOne source behind this claim
The record
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
C8-3
The core PIH mechanism (melanocytes overproduce pigment in response to inflammation on elevated-melanin-density skin).
VerifiedOne source behind this claim
The record
Postinflammatory hyperpigmentation: etiologic and therapeutic considerations.
C11-1
Chronic friction induces hyperpigmentation (frictional melanosis).
VerifiedOne of 2 sources behind this claim · see the other
The record
Current understanding of frictional dermatoses: A review.
VerifiedOne of 2 sources behind this claim · see the other
The record
Frictional melanosis: A pediatric case series
C11-5
PIH is often chronic; improves only partially and slowly.
VerifiedOne of 2 sources behind this claim · see the other
The record
Treatment of Post-Inflammatory Hyperpigmentation in Skin of Colour: A Systematic Review
VerifiedOne of 2 sources behind this claim · see the other
The record
Management of hyperpigmentation: Current treatments and emerging therapies
C12-1
Iron-oxide sunscreen protects against visible-light-induced pigmentation in Fitzpatrick III-VI, including melasma, where SPF alone did not.
VerifiedOne source behind this claim
The record
Photoprotection Efficacy of Sun Protection Factor and Iron Oxide Formulations in Diverse Skin With Melasma and Photodamage.
C12-2
Visible light is ~45% of solar spectrum and can induce persistent darkening, especially in skin of color.
VerifiedOne of 2 sources behind this claim · see the other
The record
Photoprotection Efficacy of Sun Protection Factor and Iron Oxide Formulations in Diverse Skin With Melasma and Photodamage.
VerifiedOne of 2 sources behind this claim · see the other
The record
Enhancing Photoprotection: Assessing Visible Light Photoprotection in Tinted Inorganic Sunscreens.
C12-3
Tranexamic acid produced significantly greater melasma improvement (MASI) than ascorbic acid mesotherapy in skin-of-color patients.
VerifiedOne source behind this claim
The record
Comparison of the Efficacy of Intralesional Ascorbic Acid Mesotherapy and Intralesional Tranexamic Acid in Treating Melasma in the Skin of Colour Population.
C12-4
Azelaic acid inhibits tyrosinase and accelerates keratinocyte turnover.
VerifiedOne source behind this claim
The record
The treatment of melasma. 20% azelaic acid versus 4% hydroquinone cream.
C12-5
Niacinamide at 10-12% blocks melanosome transfer.
VerifiedOne source behind this claim
The record
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
C16-1
Visible light induces pigmentation in darker skin; iron-oxide tints block it, plain nanoparticle mineral filters do not.
VerifiedOne source behind this claim
The record
Photoprotection beyond ultraviolet radiation: A review of tinted sunscreens
C16-2
Iron-oxide/tinted photoprotection corroboration for skin of color.
VerifiedOne source behind this claim
The record
Sunscreens part 1: Mechanisms and efficacy
C16-3
Physical sunscreens with iron oxide and silicones give a photoprotective + camouflage effect in melasma.
VerifiedOne source behind this claim
The record
Medical therapies for melasma
C16-6
Visible light's role in melasma is established; its role in PIH specifically remains to be demonstrated.
VerifiedOne source behind this claim
The record
L’hyperpigmentation post-inflammatoire
C18-1
L-ascorbic acid penetrates skin only below pH 3.5, optimal absorption ~20%; several derivatives did not raise skin vitamin C levels in the same study.
VerifiedOne source behind this claim
The record
Topical L-ascorbic acid: percutaneous absorption studies.
C18-2
PIH affects darker skin with greater frequency/severity; azelaic acid, niacinamide, ascorbic acid are recognized topical depigmenting agents in skin of color.
VerifiedOne source behind this claim
The record
Postinflammatory hyperpigmentation: a review of the epidemiology, clinical features, and treatment options in skin of color.
C18-5
Citrus-induced phytophotodermatitis can present as hyperpigmentation without preceding inflammation, especially in dark-skinned people.
VerifiedOne source behind this claim
The record
Asymptomatic Hyperpigmentation without Preceding Inflammation as a Clinical Feature of Citrus Fruits-Induced Phytophotodermatitis.
C21-6
On skin of color, irritation itself can trigger PIH; clinical approach is to start low and titrate up.
VerifiedOne of 2 sources behind this claim · see the other
The record
Acne in ethnic skin: special considerations for therapy.
VerifiedOne of 2 sources behind this claim · see the other
The record
Dermatology: how to manage acne in skin of colour.
C21-7
Topical retinoids reduce hyperpigmentation in patients with skin of color and should be started early.
VerifiedOne source behind this claim
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
C21-8
All-Black-patient RCT: 0.1% tretinoin improved melasma (MASI) 32% vs 10% vehicle over 40 weeks; side effects limited to mild retinoid dermatitis in 67%.
VerifiedOne source behind this claim
The record
Topical retinoic acid (tretinoin) for melasma in black patients. A vehicle-controlled clinical trial.
C23-2
Frictional melanosis is an acquired pigmentary disorder — brown pigmentation from repeated rubbing — recognized among frictional dermatoses, prevalent in more pigmented skin.
VerifiedOne of 2 sources behind this claim · see the other
The record
Orphan rocker tracks: a variant of friction melanosis in an institutionalized child.
VerifiedOne of 2 sources behind this claim · see the other
The record
Current understanding of frictional dermatoses: A review.
C23-3
In richly pigmented skin, frictional/postinflammatory pigmentation is common; PIH risk requires cautious, individualized treatment.
VerifiedOne of 2 sources behind this claim · see the other
The record
Facial Melanosis: A Comprehensive Review of Uncommon and Common Presentations with Personal Experience.
VerifiedOne of 2 sources behind this claim · see the other
The record
Atopic dirty neck or acquired atopic hyperpigmentation? An epidemiological and clinical study from the National Skin Centre in Singapore.
CFITZ-1
The Fitzpatrick scale (developed 1975 by Thomas Fitzpatrick) classifies UV response, not appearance; Types I-VI run from always-burns/never-tans to never-burns/tans-deeply; higher melanin density means higher PIH risk, not more protection; product concentrations formulated/tested on Fitzpatrick I-III can inflame IV-VI skin.
VerifiedOne of 3 sources behind this claim · see the others
The record
The validity and practicality of sun-reactive skin types I through VI.
VerifiedOne of 3 sources behind this claim · see the others
The record
Are the Fitzpatrick Skin Phototypes Valid for Cancer Risk Assessment in a Racially and Ethnically Diverse Sample of Women?
VerifiedOne of 3 sources behind this claim · see the others
The record
Postinflammatory hyperpigmentation: etiologic and therapeutic considerations.
Concern9 claims · 11 studies · 1 reference
intimate area
C11-1
Chronic friction induces hyperpigmentation (frictional melanosis).
VerifiedOne of 2 sources behind this claim · see the other
The record
Current understanding of frictional dermatoses: A review.
VerifiedOne of 2 sources behind this claim · see the other
The record
Frictional melanosis: A pediatric case series
C11-2
Occlusion and hydration increase how deeply/quickly topical actives penetrate skin.
VerifiedOne of 2 sources behind this claim · see the other
The record
The Effect of Sequential Topical Application of Dermatologic Medications on Absorption: Clinical Considerations.
VerifiedOne of 2 sources behind this claim · see the other
The record
Methodology to measure the transient effect of occlusion on skin penetration and stratum corneum hydration in vivo
C11-4
Pregnancy-related hyperpigmentation is common and usually eases postpartum.
VerifiedOne source behind this claim
The record
Physiological Skin Changes During Pregnancy
C11-5
PIH is often chronic; improves only partially and slowly.
VerifiedOne of 2 sources behind this claim · see the other
The record
Treatment of Post-Inflammatory Hyperpigmentation in Skin of Colour: A Systematic Review
VerifiedOne of 2 sources behind this claim · see the other
The record
Management of hyperpigmentation: Current treatments and emerging therapies
C20-3
Hypo-oestrogenism lowers water retention and impairs barrier function, raising irritant-dermatitis risk.
VerifiedOne source behind this claim
The record
Menopause, skin and common dermatosis. Part 3: genital disorders.
C20-4
General management of vulvar dermatoses is gentle cleansing, avoidance of irritants, optimized skincare, patch testing where contact allergy is suspected.
VerifiedOne source behind this claim
The record
Update vulval dermatology - diagnostics and therapy.
C20-5
Lichen simplex chronicus produces hyperpigmented lichenified plaques from rubbing; PIH/hypopigmentation varies with natural skin color.
VerifiedOne source behind this claim
The record
Vulvar Dermatoses: A Review and Update.
C20-6
Few studies focus on vulvar disease in skin of color; lichen sclerosus, vitiligo, and inflammatory vulvitis are frequently misdiagnosed as one another; mean delay to LS diagnosis 16.43 months.
VerifiedOne source behind this claim
The record
Insights from a joint pediatric dermatology‐gynecology vulvar clinic: A retrospective study
C20-7
Lichen sclerosus is often misdiagnosed as vitiligo on darker skin due to hypopigmentation contrast; scarring and thickening are the distinguishing signs vitiligo does not produce.
Patient organizationVerifiedSource record for this claim
The record
Lichen Sclerosus Support Network
Concern4 claims · 4 studies
makeup
C16-1
Visible light induces pigmentation in darker skin; iron-oxide tints block it, plain nanoparticle mineral filters do not.
VerifiedOne source behind this claim
The record
Photoprotection beyond ultraviolet radiation: A review of tinted sunscreens
C16-2
Iron-oxide/tinted photoprotection corroboration for skin of color.
VerifiedOne source behind this claim
The record
Sunscreens part 1: Mechanisms and efficacy
C16-3
Physical sunscreens with iron oxide and silicones give a photoprotective + camouflage effect in melasma.
VerifiedOne source behind this claim
The record
Medical therapies for melasma
C16-6
Visible light's role in melasma is established; its role in PIH specifically remains to be demonstrated.
VerifiedOne source behind this claim
The record
L’hyperpigmentation post-inflammatoire
Concern4 claims · 4 studies
post acne
C13-3
A brief benzoyl peroxide contact suppresses S. aureus without the full-spectrum damage of longer-contact antibacterial washes.
VerifiedOne source behind this claim
The record
A New, Once-daily, Optimized, Fixed Combination of Clindamycin Phosphate 1.2% and Low-concentration Benzoyl Peroxide 2.5% Gel for the Treatment of Moderate-to-Severe Acne.
C24-1
Acne is a common cause of PIH, particularly in skin of color; resulting marks are often more distressing to patients than the acne itself.
VerifiedOne source behind this claim
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
C24-2
In skin of color, acne treatment must balance efficacy against irritation, because irritation itself triggers PIH; treat early, titrate gently.
VerifiedOne of 2 sources behind this claim · see the other
The record
Dermatology: how to manage acne in skin of colour.
VerifiedOne of 2 sources behind this claim · see the other
The record
Postinflammatory hyperpigmentation: a review of the epidemiology, clinical features, and treatment options in skin of color.
C24-3
Topical retinoids and azelaic acid treat acne and reduce post-acne hyperpigmentation in skin of color.
VerifiedOne of 2 sources behind this claim · see the other
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
VerifiedOne of 2 sources behind this claim · see the other
The record
Dermatology: how to manage acne in skin of colour.
Concern3 claims · 5 studies
razor bumps
C7-1
Nd:YAG laser is safe and effective for PFB on Fitzpatrick IV-VI skin; other wavelengths risk burns or paradoxical pigmentation.
They asked
Whether a long-pulse Nd:YAG laser reduces razor bumps on dark skin without harming it.
How26 people with skin types IV–VI whose bumps hadn't responded to treatment. One side of the neck was lasered, the other left alone; bumps were counted a month later.
They foundAbout 12 bumps on the treated side against about 30 on the untreated side, one month on. The authors call it safe and effective.
Small, one month, one clinic, and a side-by-side design — good evidence that it works in the short term, on 26 people. No one has told us what it looks like a year later.
The record
Treatment of pseudofolliculitis barbae in very dark skin with a long pulse Nd:YAG laser.
They asked
Which lasers can remove hair on darker skin safely, now that longer wavelengths and better cooling exist.
HowA review of the laser types and settings, by a dermatologist at Howard.
They foundLong-pulsed diode and Nd:YAG lasers, used with conservative settings and more sessions, are the ones suited to darker skin — including for razor bumps.
A review, so it gathers rather than tests. It agrees with Ross on the wavelength, which is why the two sit together.
The record
Laser-assisted hair removal for darker skin types.
C7-2
With-the-grain shaving and single-blade/foil razors are the standard mechanism-based recommendation for PFB; direct comparative clinical evidence is limited and partly mixed — a consistent regimen with pre/post-shave care may matter as much as blade count.
They asked
Whether the usual advice for razor bumps — shave less, use one blade — actually holds up.
HowA review: the authors read the existing studies rather than running a new one.
They foundThere isn't robust evidence that one blade beats many, or that shaving less helps. One recent study found daily shaving with a multi-blade razor didn't make it worse when it was part of a routine, and early evidence says wetting before and moisturizing after may help.
This is a review, not a trial, and it says plainly that the trials needed haven't been done. Our one-blade advice is mechanism, not settled evidence; the routine around the shave is the better-supported part.
VerifiedOne source behind this claim
The record
Pseudofolliculitis barbae: understanding the condition and the role of facial grooming.
C9-5
Keloid formation is significantly more prevalent in Fitzpatrick IV-VI populations.
VerifiedOne of 2 sources behind this claim · see the other
The record
Multi-ancestry meta-analysis of keloids uncovers novel susceptibility loci in diverse populations.
VerifiedOne of 2 sources behind this claim · see the other
The record
Keloid disease: Review with clinical atlas. Part I: Definitions, history, epidemiology, clinics and diagnosis.
Concern2 claims · 2 studies
skin of color
C8-2
Erythema-based severity scales are validated on Fitzpatrick I-III; skin-of-color patients are systematically underdiagnosed or misclassified by tools not designed for their presentations.
VerifiedOne source behind this claim
The record
Diagnostic Disparities in Erythema Visibility: A Call to Redefine Inflammatory Assessment in Diverse Skin Tones.
C8-3
The core PIH mechanism (melanocytes overproduce pigment in response to inflammation on elevated-melanin-density skin).
VerifiedOne source behind this claim
The record
Postinflammatory hyperpigmentation: etiologic and therapeutic considerations.
Concern2 claims · 2 studies
squeaky clean
C5-1
Hard water dramatically increases barrier damage from surfactant cleansers — calcium/magnesium ions bind to surfactants and remain on skin after rinsing.
VerifiedOne source behind this claim
The record
The Effect of Water Hardness on Surfactant Deposition after Washing and Subsequent Skin Irritation in Atopic Dermatitis Patients and Healthy Control Subjects.
C5-2
Skin surface pH averages ~4.7-5.5; acidic pH keeps resident flora attached, alkaline disperses it; below-5 skin is in better barrier condition.
VerifiedOne source behind this claim
The record
Natural skin surface pH is on average below 5, which is beneficial for its resident flora.
Concern5 claims · 3 studies · 3 references
sun protection
C12-1
Iron-oxide sunscreen protects against visible-light-induced pigmentation in Fitzpatrick III-VI, including melasma, where SPF alone did not.
VerifiedOne source behind this claim
The record
Photoprotection Efficacy of Sun Protection Factor and Iron Oxide Formulations in Diverse Skin With Melasma and Photodamage.
C12-2
Visible light is ~45% of solar spectrum and can induce persistent darkening, especially in skin of color.
VerifiedOne of 2 sources behind this claim · see the other
The record
Photoprotection Efficacy of Sun Protection Factor and Iron Oxide Formulations in Diverse Skin With Melasma and Photodamage.
VerifiedOne of 2 sources behind this claim · see the other
The record
Enhancing Photoprotection: Assessing Visible Light Photoprotection in Tinted Inorganic Sunscreens.
C15-1
Fitzpatrick VI skin has a natural SPF equivalent of approximately 13.
VerifiedOne source behind this claim
The record
A Comprehensive Review of the Role of UV Radiation in Photoaging Processes Between Different Types of Skin.
C26-2
The FDA approved bemotrizinol (Tinosorb S) as a sunscreen active on June 9, 2026, effective August 9, 2026 — the first new UV filter approved for US use in 20 years.
Regulatory recordVerifiedSource record for this claim
The record
FDA announcement: expands sunscreen options for first time in 20 years
Regulatory recordVerifiedSource record for this claim
The record
FDA Q&A on OTC sunscreen regulatory actions
C26-5
Waterproof,' 'sunblock,' and 'sweatproof' are prohibited on US sunscreen labels; only 'water resistant 40/80 minutes' is permitted.
Regulatory recordVerifiedSource record for this claim
The record
21 CFR 201.327(g)
Concern8 claims · 10 studies · 1 reference
sweat
C13-1
Antiperspirant/deodorant products can compromise the axillary microbiome balance.
VerifiedOne source behind this claim
The record
The potential prebiotic effect of 2-Butyloctanol on the human axillary microbiome.
C13-2
Essential oils marketed as natural (lavender, tea tree) are a documented cause of allergic contact dermatitis.
VerifiedOne of 2 sources behind this claim · see the other
The record
Art of Prevention: Essential Oils - Natural Products Not Necessarily Safe.
VerifiedOne of 2 sources behind this claim · see the other
The record
Allergic contact dermatitis from essential oil in consumer products: Mode of uses and value of patch tests with an essential oil series. Results of a French study of the DAG (Dermato-Allergology group of the French Society of Dermatology).
C13-3
A brief benzoyl peroxide contact suppresses S. aureus without the full-spectrum damage of longer-contact antibacterial washes.
VerifiedOne source behind this claim
The record
A New, Once-daily, Optimized, Fixed Combination of Clindamycin Phosphate 1.2% and Low-concentration Benzoyl Peroxide 2.5% Gel for the Treatment of Moderate-to-Severe Acne.
C14-2
One small study found no aluminum detected in apocrine glands after antiperspirant use; concluded absorption-risk concerns look unfounded on that data.
VerifiedOne source behind this claim
The record
Are Antiperspirants Safe? Shedding Light on the Distribution of Aluminum Compounds in Sweat Glands.
C14-3
Essential oils (lavender, tea tree) are a documented cause of allergic contact dermatitis.
VerifiedOne of 2 sources behind this claim · see the other
The record
Art of Prevention: Essential Oils - Natural Products Not Necessarily Safe.
VerifiedOne of 2 sources behind this claim · see the other
The record
Allergic contact dermatitis from essential oil in consumer products: Mode of uses and value of patch tests with an essential oil series. Results of a French study of the DAG (Dermato-Allergology group of the French Society of Dermatology).
C23-1
Intertrigo is a superficial inflammatory condition of skin folds triggered by friction/moisture/heat/poor ventilation; can become secondarily infected (often Candida).
ReferenceVerifiedSource record for this claim
The record
Intertrigo
VerifiedOne source behind this claim
The record
Intertriginous eruption.
C23-2
Frictional melanosis is an acquired pigmentary disorder — brown pigmentation from repeated rubbing — recognized among frictional dermatoses, prevalent in more pigmented skin.
VerifiedOne of 2 sources behind this claim · see the other
The record
Orphan rocker tracks: a variant of friction melanosis in an institutionalized child.
VerifiedOne of 2 sources behind this claim · see the other
The record
Current understanding of frictional dermatoses: A review.
C23-3
In richly pigmented skin, frictional/postinflammatory pigmentation is common; PIH risk requires cautious, individualized treatment.
VerifiedOne of 2 sources behind this claim · see the other
The record
Facial Melanosis: A Comprehensive Review of Uncommon and Common Presentations with Personal Experience.
VerifiedOne of 2 sources behind this claim · see the other
The record
Atopic dirty neck or acquired atopic hyperpigmentation? An epidemiological and clinical study from the National Skin Centre in Singapore.
Concern5 claims · 8 studies
wound care
C9-1
Moist wound healing accelerates re-epithelialization by approximately 50% vs air-drying (seminal study: ~2x faster).
VerifiedOne of 2 sources behind this claim · see the other
The record
Formation of the scab and the rate of epithelization of superficial wounds in the skin of the young domestic pig.
VerifiedOne of 2 sources behind this claim · see the other
The record
Comparison of skin graft donor site management using oxidised regenerated cellulose (ORC)/collagen/silver-ORC with absorptive silicone adhesive border and transparent film dressing vs semi-occlusive dressings.
C9-2
Silicone gel/sheeting is the internationally recommended first-line OTC scar-prevention intervention (occlusion + hydration normalizes scar-cell overactivity); underlying RCT evidence for scar therapies generally carries some uncertainty per Cochrane, but silicone remains first-line consensus.
VerifiedOne source behind this claim
The record
The Use of Silicone Adhesives for Scar Reduction.
C9-3
Neomycin is among the most common contact allergens identified in patch testing (pooled prevalence 3.2% adults, 6.4% North America); ACDS Allergen of the Year 2010.
VerifiedOne source behind this claim
The record
Prevalence of Contact Allergy to Neomycin in Dermatitis Patients: A Systematic Review and Meta-Analysis.
C9-4
Topical vitamin E does not improve scar appearance (no effect or worsened in 90% of a split-scar trial) and causes contact dermatitis in ~33% of users.
VerifiedOne of 2 sources behind this claim · see the other
The record
The effects of topical vitamin E on the cosmetic appearance of scars.
VerifiedOne of 2 sources behind this claim · see the other
The record
The Role of Topical Vitamin E in Scar Management: A Systematic Review.
C9-5
Keloid formation is significantly more prevalent in Fitzpatrick IV-VI populations.
VerifiedOne of 2 sources behind this claim · see the other
The record
Multi-ancestry meta-analysis of keloids uncovers novel susceptibility loci in diverse populations.
VerifiedOne of 2 sources behind this claim · see the other
The record
Keloid disease: Review with clinical atlas. Part I: Definitions, history, epidemiology, clinics and diagnosis.
Ingredient8 claims · 12 studies · 2 references
azelaic acid
C4-1
Azelaic acid 15-20% produced brightening comparable to 4% hydroquinone for melasma over 24 weeks, with better tolerability and no ochronosis or sensitization, replicated across Fitzpatrick III-V comparative studies.
VerifiedOne of 5 sources behind this claim · see the others
The record
The treatment of melasma. 20% azelaic acid versus 4% hydroquinone cream.
VerifiedOne of 5 sources behind this claim · see the others
The record
Interventions for melasma.
VerifiedOne of 5 sources behind this claim · see the others
The record
Comparative study of therapeutic effects of 20% azelaic acid and hydroquinone 4% cream in the treatment of melasma.
VerifiedOne of 5 sources behind this claim · see the others
The record
A Comprehensive Review of Azelaic Acid Pharmacological Properties, Clinical Applications, and Innovative Topical Formulations.
VerifiedOne of 5 sources behind this claim · see the others
The record
Topical and Systemic Therapies in Melasma: A Systematic Review.
C4-2
Azelex (20% cream) FDA-approved ~Sept 1995 for acne; Finacea (15% gel) FDA-approved Dec 2002 for rosacea — 'over 30 years' framing accurate.
Regulatory recordVerifiedSource record for this claim
The record
Drugs@FDA — NDA 020428 (Azelex 20%)
Regulatory recordVerifiedSource record for this claim
The record
Drugs@FDA — NDA 021470 (Finacea 15%)
C11-7
Niacinamide blocks melanosome transfer; Azelaic Acid slows tyrosinase.
VerifiedOne of 2 sources behind this claim · see the other
The record
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
VerifiedOne of 2 sources behind this claim · see the other
The record
The treatment of melasma. 20% azelaic acid versus 4% hydroquinone cream.
C12-4
Azelaic acid inhibits tyrosinase and accelerates keratinocyte turnover.
VerifiedOne source behind this claim
The record
The treatment of melasma. 20% azelaic acid versus 4% hydroquinone cream.
C18-6
Commercial azelaic acid is produced almost entirely by ozonolysis of oleic acid; occurs in grains but is not extracted from them at usable scale.
VerifiedOne of 2 sources behind this claim · see the other
The record
Extraction and Quantification of Azelaic Acid from Different Wheat Samples (Triticum durum Desf.) and Evaluation of Their Antimicrobial and Antioxidant Activities.
VerifiedOne of 2 sources behind this claim · see the other
The record
Characterizing the Potential for Sustainable Azelaic Acid Production from High-Oleic Vegetable Oil Using Two-Step Oxidative Cleavage.
C24-3
Topical retinoids and azelaic acid treat acne and reduce post-acne hyperpigmentation in skin of color.
VerifiedOne of 2 sources behind this claim · see the other
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
VerifiedOne of 2 sources behind this claim · see the other
The record
Dermatology: how to manage acne in skin of colour.
C35-9
Azelaic acid — 4 mechanisms (antimicrobial, tyrosinase inhibition, free-radical scavenging, reduced neutrophil ROS).
VerifiedOne source behind this claim
The record
The multiple uses of azelaic acid in dermatology: mechanism of action, preparations, and potential therapeutic applications.
C35-10
Azelaic acid also keratolytic.
VerifiedOne source behind this claim
The record
Azelaic acid gel 15%: clinical versatility in the treatment of rosacea.
Ingredient5 claims · 6 studies
ceramides
C29-1
African American skin was characterized by low ceramide levels in the uppermost layers of the stratum corneum, interpretable alongside the high prevalence of xerosis in Black skin.
VerifiedOne source behind this claim
The record
Structural and functional differences in barrier properties of African American, Caucasian and East Asian skin
C29-3
Ceramide subclass composition is tightly linked to barrier function; a skewed or altered ceramide profile correlates with barrier dysfunction.
VerifiedOne source behind this claim
The record
Lesional skin of seborrheic dermatitis patients is characterized by skin barrier dysfunction and correlating alterations in the stratum corneum ceramide composition
C29-4
There are 12+ distinct ceramide subclasses in human skin; a well-built barrier product leads with a few, commonly Ceramide NP/AP/EOP.
VerifiedOne of 3 sources behind this claim · see the others
The record
Ceramide composition of the psoriatic scale.
VerifiedOne of 3 sources behind this claim · see the others
The record
Characterization of overall ceramide species in human stratum corneum.
VerifiedOne of 3 sources behind this claim · see the others
The record
Profiling and characterizing skin ceramides using reversed-phase liquid chromatography-quadrupole time-of-flight mass spectrometry.
C31-9
Black skin shows increased transepidermal water loss, decreased ceramide levels, and lower stratum corneum pH; management emphasizes low-pH products and emollients.
VerifiedOne source behind this claim
The record
Pruritus in Black Skin: Unique Molecular Characteristics and Clinical Features.
C31-10
African American skin is characterized by low ceramide levels and high protein cohesion in the uppermost stratum corneum, interpreted in relation to the high prevalence of xerosis.
VerifiedOne source behind this claim
The record
Structural and functional differences in barrier properties of African American, Caucasian and East Asian skin.
Ingredient2 claims · 3 studies
hocl
C10-2
Bleach kills bacteria (textbook); bleach-bath clinical benefit in AD not established as superior to plain water; HOCl reduces bacterial load on its own merits.
VerifiedOne of 2 sources behind this claim · see the other
The record
Efficacy of bleach baths in reducing severity of atopic dermatitis: A systematic review and meta-analysis.
Where we use it
VerifiedOne of 2 sources behind this claim · see the other
The record
Therapeutic Indices of Topical Antiseptics in Wound Care: A Systematic Review.
Where we use it
C10-4
HOCl is anti-inflammatory (scoping review).
VerifiedOne source behind this claim
The record
Past, Present, and Future of Sodium Hypochlorite in Dermatology: A Scoping Review.
Where we use it
Ingredient6 claims · 14 studies
hydroquinone
C2-3
A 3% topical TXA formulation produced no detectable systemic absorption and efficacy comparable to 3% hydroquinone + dexamethasone.
VerifiedOne of 3 sources behind this claim · see the others
The record
Efficacy and safety of topical agents in the treatment of melasma: What's evidence? A systematic review and meta-analysis.
VerifiedOne of 3 sources behind this claim · see the others
The record
Topical application of tranexamic acid for the reduction of bleeding.
VerifiedOne of 3 sources behind this claim · see the others
The record
Pilot Clinical Safety and Efficacy Evaluation of a Topical 3% Tranexamic Acid Cream and Serum Protocol for Managing Facial Hyperpigmentation in Caucasian Patients
C3-2
4% niacinamide showed comparable efficacy to 4% hydroquinone for melasma, with fewer reported side effects (18% vs 29%, not statistically tested).
VerifiedOne source behind this claim
The record
A Double-Blind, Randomized Clinical Trial of Niacinamide 4% versus Hydroquinone 4% in the Treatment of Melasma.
C4-1
Azelaic acid 15-20% produced brightening comparable to 4% hydroquinone for melasma over 24 weeks, with better tolerability and no ochronosis or sensitization, replicated across Fitzpatrick III-V comparative studies.
VerifiedOne of 5 sources behind this claim · see the others
The record
The treatment of melasma. 20% azelaic acid versus 4% hydroquinone cream.
VerifiedOne of 5 sources behind this claim · see the others
The record
Interventions for melasma.
VerifiedOne of 5 sources behind this claim · see the others
The record
Comparative study of therapeutic effects of 20% azelaic acid and hydroquinone 4% cream in the treatment of melasma.
VerifiedOne of 5 sources behind this claim · see the others
The record
A Comprehensive Review of Azelaic Acid Pharmacological Properties, Clinical Applications, and Innovative Topical Formulations.
VerifiedOne of 5 sources behind this claim · see the others
The record
Topical and Systemic Therapies in Melasma: A Systematic Review.
C6-1
4% hydroquinone cream at 12-24 weeks produces meaningful MASI reduction, outperforming most OTC brighteners for melasma (gold-standard comparator).
VerifiedOne of 2 sources behind this claim · see the other
The record
A Randomized, Controlled, Split-Face, Double-Blind Study Comparing Topical Malassezin to Hydroquinone 4% for Melasma.
VerifiedOne of 2 sources behind this claim · see the other
The record
Safety and efficacy of niosomal and conventional tranexamic acid/niacinamide vs. hydroquinone creams in melasma: A randomized, double-blind, case-controlled clinical trial.
C6-2
Exogenous ochronosis (blue-black-gray discoloration) is associated with prolonged HQ use (often years), disproportionately affects Fitzpatrick IV-VI skin, and is documented even at 2-4% OTC concentrations — no safe concentration threshold.
VerifiedOne of 2 sources behind this claim · see the other
The record
Exogenous Ochronosis: Characterizing a Rare Disorder in Skin of Color.
VerifiedOne of 2 sources behind this claim · see the other
The record
Clinical and dermoscopic characteristics of exogenous ochronosis: results of a multicentre study by the International Dermoscopy Society Dermoscopy in Skin of Color Task Force.
C6-3
The Kligman formula (HQ-tretinoin-corticosteroid) originated in 1975 at 5% hydroquinone / 0.1% tretinoin / 0.1% dexamethasone.
VerifiedOne source behind this claim
The record
A new formula for depigmenting human skin.
Ingredient4 claims · 3 studies
niacinamide
C3-1
2-5% niacinamide produced statistically significant melanin-density reduction over 4-8 weeks (35-68% melanosome-transfer inhibition in coculture).
VerifiedOne source behind this claim
The record
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
C3-2
4% niacinamide showed comparable efficacy to 4% hydroquinone for melasma, with fewer reported side effects (18% vs 29%, not statistically tested).
VerifiedOne source behind this claim
The record
A Double-Blind, Randomized Clinical Trial of Niacinamide 4% versus Hydroquinone 4% in the Treatment of Melasma.
C11-7
Niacinamide blocks melanosome transfer; Azelaic Acid slows tyrosinase.
VerifiedOne of 2 sources behind this claim · see the other
The record
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
VerifiedOne of 2 sources behind this claim · see the other
The record
The treatment of melasma. 20% azelaic acid versus 4% hydroquinone cream.
C12-5
Niacinamide at 10-12% blocks melanosome transfer.
VerifiedOne source behind this claim
The record
The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer.
Ingredient11 claims · 9 studies · 1 reference
retinoids
C21-1
All retinoids act through the retinoic acid receptor; later generations bind it more selectively.
ReferenceVerifiedSource record for this claim
The record
Adapalene
VerifiedOne source behind this claim
The record
Vitamins and the skin: Vitamin A and retinoids in dermatology.
C21-2
Topical retinoids increase collagen and normalize keratinocytes/melanocytes, improving wrinkles, texture, and tone.
VerifiedOne of 2 sources behind this claim · see the other
The record
Topical Treatments for Photoaged Skin.
VerifiedOne of 2 sources behind this claim · see the other
The record
Topical tretinoin for treating photoaging: A systematic review of randomized controlled trials.
C21-3
Retinoid efficacy for photoaging is dose-dependent; irritation is concentration-dependent.
VerifiedOne source behind this claim
The record
Topical Treatments for Photoaged Skin.
C21-4
Adapalene at 0.1% improved wrinkles and pigmentation over six months and was well tolerated.
VerifiedOne source behind this claim
The record
Effectiveness and tolerability of adapalene cream 0.1% in the treatment of female skin ageing: A randomised controlled trial.
C21-5
A retinol-precursor formula matched tretinoin 0.02% on photodamage with erythema six times less frequent (11% vs 64%).
VerifiedOne source behind this claim
The record
Biomarkers of Tretinoin Precursors and Tretinoin Efficacy in Patients With Moderate to Severe Facial Photodamage: A Randomized Clinical Trial.
C21-6
On skin of color, irritation itself can trigger PIH; clinical approach is to start low and titrate up.
VerifiedOne of 2 sources behind this claim · see the other
The record
Acne in ethnic skin: special considerations for therapy.
VerifiedOne of 2 sources behind this claim · see the other
The record
Dermatology: how to manage acne in skin of colour.
C21-7
Topical retinoids reduce hyperpigmentation in patients with skin of color and should be started early.
VerifiedOne source behind this claim
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
C21-8
All-Black-patient RCT: 0.1% tretinoin improved melasma (MASI) 32% vs 10% vehicle over 40 weeks; side effects limited to mild retinoid dermatitis in 67%.
VerifiedOne source behind this claim
The record
Topical retinoic acid (tretinoin) for melasma in black patients. A vehicle-controlled clinical trial.
C21-9
Major photoaging efficacy RCTs have largely been conducted on lighter (Fitzpatrick I-III) skin — the research-population gap named once in the body.
VerifiedOne source behind this claim
The record
Biomarkers of Tretinoin Precursors and Tretinoin Efficacy in Patients With Moderate to Severe Facial Photodamage: A Randomized Clinical Trial.
C22-3
Topical retinoids build collagen; on skin of color the gentlest effective strength avoids irritation-triggered PIH.
VerifiedOne of 4 sources behind this claim · see the others
The record
Topical Treatments for Photoaged Skin.
VerifiedOne of 4 sources behind this claim · see the others
The record
Topical tretinoin for treating photoaging: A systematic review of randomized controlled trials.
VerifiedOne of 4 sources behind this claim · see the others
The record
Acne in ethnic skin: special considerations for therapy.
VerifiedOne of 4 sources behind this claim · see the others
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
C24-3
Topical retinoids and azelaic acid treat acne and reduce post-acne hyperpigmentation in skin of color.
VerifiedOne of 2 sources behind this claim · see the other
The record
Effects of Topical Retinoids on Acne and Post-inflammatory Hyperpigmentation in Patients with Skin of Color: A Clinical Review and Implications for Practice.
VerifiedOne of 2 sources behind this claim · see the other
The record
Dermatology: how to manage acne in skin of colour.
Ingredient6 claims · 9 studies
tranexamic
C2-1
Oral tranexamic acid 250mg twice daily for 3 months produced a 49% mMASI reduction vs 18% placebo.
VerifiedOne source behind this claim
The record
Randomized, placebo-controlled, double-blind study of oral tranexamic acid in the treatment of moderate-to-severe melasma.
C2-2
10% topical TXA delivered via microneedling produced 65.92% mMASI improvement at 8 weeks vs 20.75% with microneedling alone.
VerifiedOne source behind this claim
The record
Clinical Efficacy of Topical Tranexamic Acid With Microneedling in Melasma.
C2-3
A 3% topical TXA formulation produced no detectable systemic absorption and efficacy comparable to 3% hydroquinone + dexamethasone.
VerifiedOne of 3 sources behind this claim · see the others
The record
Efficacy and safety of topical agents in the treatment of melasma: What's evidence? A systematic review and meta-analysis.
VerifiedOne of 3 sources behind this claim · see the others
The record
Topical application of tranexamic acid for the reduction of bleeding.
VerifiedOne of 3 sources behind this claim · see the others
The record
Pilot Clinical Safety and Efficacy Evaluation of a Topical 3% Tranexamic Acid Cream and Serum Protocol for Managing Facial Hyperpigmentation in Caucasian Patients
C2-4
No increased venous or arterial thromboembolic risk in non-surgical patients without underlying risk factors taking systemic TXA.
VerifiedOne source behind this claim
The record
Risk of venous and arterial thrombosis in non-surgical patients receiving systemic tranexamic acid: A systematic review and meta-analysis.
C2-5
Oral TXA given around a laser procedure did not reliably prevent post-procedure PIH; the higher-dose trial sped clearance of pigment rather than preventing it.
VerifiedOne of 2 sources behind this claim · see the other
The record
A Prospective Randomized Controlled Study of Oral Tranexamic Acid for Preventing Postinflammatory Hyperpigmentation After Q-Switched Ruby Laser
VerifiedOne of 2 sources behind this claim · see the other
The record
A Prospective Randomized Controlled Study of Oral Tranexamic Acid for the Prevention of Postinflammatory Hyperpigmentation After Q‐Switched 532‐nm Nd:YAG Laser for Solar Lentigines
C12-3
Tranexamic acid produced significantly greater melasma improvement (MASI) than ascorbic acid mesotherapy in skin-of-color patients.
VerifiedOne source behind this claim
The record
Comparison of the Efficacy of Intralesional Ascorbic Acid Mesotherapy and Intralesional Tranexamic Acid in Treating Melasma in the Skin of Colour Population.
Ingredient4 claims · 11 studies
vitamin c
C1-2
SAP (sodium ascorbyl phosphate) was effective and well tolerated in a controlled trial — for acne, not hyperpigmentation; SAP's pigmentation role rests on shared vitamin C mechanism, not direct pigmentation RCTs (those exist mostly for the magnesium form MAP; sodium AP alone showed only a weak effect at 6%).
VerifiedOne of 4 sources behind this claim · see the others
The record
Sodium L-ascorbyl-2-phosphate 5% lotion for the treatment of acne vulgaris: a randomized, double-blind, controlled trial.
VerifiedOne of 4 sources behind this claim · see the others
The record
Treatment of refractory melasma with combination of topical 5% magnesium ascorbyl phosphate and fluorescent pulsed light in Asian patients.
VerifiedOne of 4 sources behind this claim · see the others
The record
Utilization of a high-resolution digital imaging system for the objective and quantitative assessment of hyperpigmented spots on the face.
VerifiedOne of 4 sources behind this claim · see the others
The record
Whitening effect of L-ascorbate-2-phosphate trisodium salt on solar lentigos.
C1-3
SAP 1% showed strong antimicrobial and skin-clarifying activity.
VerifiedOne source behind this claim
The record
Sodium ascorbyl phosphate shows in vitro and in vivo efficacy in the prevention and treatment of acne vulgaris.
C1-5
AA-2G suppresses keratinocyte-derived GM-CSF, an inflammatory factor that drives pigmentation.
VerifiedOne source behind this claim
The record
Sage extract and ascorbic acid derivative inhibit melanogenesis via downregulating keratinocyte-derived GM-CSF.
C1-6
THD ascorbate and EAA mechanism/delivery: anti-melanogenic in cell and zebrafish models; EAA stable near neutral pH; THD shows better transdermal absorption in tissue-model imaging via a nanocarrier-enhanced formulation (not plain THD).
VerifiedOne of 5 sources behind this claim · see the others
The record
The anti-melanogenic effects of 3-O-ethyl ascorbic acid via Nrf2-mediated α-MSH inhibition in UVA-irradiated keratinocytes and autophagy induction in melanocytes.
VerifiedOne of 5 sources behind this claim · see the others
The record
3-O-ethyl-l-ascorbic acid: Characterisation and investigation of single solvent systems for delivery to the skin.
VerifiedOne of 5 sources behind this claim · see the others
The record
Proteomic analysis of the combined effects of cannabigerol and 3-O-ethyl ascorbic acid on kinase-dependent signalling in UVB-irradiated human keratinocytes.
VerifiedOne of 5 sources behind this claim · see the others
The record
Enhanced wound healing via ROS-triggered release of ascorbyl tetraisopalmitate loaded in ferrocene-based polymer nanoparticles.
VerifiedOne of 5 sources behind this claim · see the others
The record
Biocompatible Lyotropic Nanocarriers for Improved Delivery of Ascorbyl Tetraisopalmitate in Skincare.
Every claim above is used on the ROOT & REIGN pages listed under it. Doctor Djeli is an educational resource, not medical advice. rootandreign.co · Reign in your skin.
Doctor Djeli is an educational resource. She reads, she explains, she refers. She does not diagnose — for that, see a clinician.