ROOT & REIGN

Hair breakage is not a hair problem. It is a friction problem.

Coily and curly hair does not break because it is weak. It breaks at the same predictable points — the bend, the tie, the pillow — every time. Fix the friction, and the breakage stops.

Close detail of tightly coiled hair resting against a silk pillowcase.
Root & Reign · Education

Hair breakage is not a hair problem. It is a friction problem.

01 The reframe

Breakage is not what your hair does wrong. It is what happens to it.

Somebody hands over a routine that has worked for years and still asks why their ends keep snapping. The instinct is to blame the hair — too dry, too coarse, too much, not enough. That instinct is wrong. Hair does not break because it is bad hair. It breaks because force landed somewhere it could not absorb, and it broke at that exact spot. Find the spot, change what touches it, and the breakage stops.

Hair does not break because it is bad hair. It breaks because force landed somewhere it could not absorb.

02 The shape

Tightly coiled hair bends back on itself, and every bend is a place it can fail.

Hair that coils tightly does not run straight from the scalp — it curves and doubles back, sometimes dozens of times over a single strand. Each bend carries more mechanical stress than the straight sections between them. A strand with many bends has many places it can crack; a straight strand has far fewer. What is settled: coily hair is, on average, significantly more curled than straighter hair types, and that curl is where knotting and cracking can start — not from a defect, from geometry.

Manystress points per strand
3contact points where it starts
03 The moisture gap

Coily hair holds less water, and dry hair cracks instead of bending.

Water is what gives a strand its give — a well-hydrated strand flexes under pressure and springs back. A dry one is stiffer, and stiff things do not bend under force, they crack. Coily and tightly curled hair takes up less water and loses it faster than straighter types, carrying a different lipid structure on its outer layer as well. That is not a flaw to correct — it is the baseline this hair works from, which is why moisture retention is structural insurance against breakage, not a styling preference.

A hand working a wide-tooth wood comb gently through the ends of a section of coiled hair.
The technique

Ends up, never root to tip. The comb meets the knot where the strand can actually give.

04 Where it actually starts

Three places take the hit before a comb ever touches your hair.

Breakage rarely starts with a bad haircare day. It starts with ordinary contact, repeated every day, in three places: the pillow, all night, every night — cotton is rough at a microscopic level and pulls moisture out of the shaft while you sleep; the comb or brush, at the exact moment it meets a knot — a fine-tooth comb squeezes the strand at the bend to force its way through, and that squeeze is where the crack starts; and the hair tie, on the way off — a standard elastic has to stretch to go on and snap back to come off, dragging across every strand caught in it.

None of these three is a product failure. They are surfaces and tools doing exactly what they are built to do, on hair they were never built for.

What actually works

Change the surface, and the same hair stops breaking.

05 What actually works

Change the surface, and the same hair stops breaking.

At night: silk or satin, not cotton — a bonnet, pillowcase, or wrapped scarf all replace a rough, moisture-pulling surface with a smooth one the hair can move against. When detangling: a wide-tooth wood comb or flexible detangling brush, used gently, starting at the ends and working up — never root to tip through a full tangle. When tying back: a “no damage” tie built to snap or release rather than stretch and pull through.

None of this requires more product. It requires a different surface at the three points where the damage was already happening — and this holds whether it is hair on the scalp, in a beard, or anywhere else the same coil pattern shows up. The comb, the pillowcase, and the tie were doing their job. They were just never built for a strand with this many bends in it.

Doctor Djeli in her apothecary
Doctor Djeli

Change the surface at the three points where the damage was already happening. The same hair that kept breaking holds on to its length.

Hair breakage almost never means your hair is bad — it means force landed on the same weak spot over and over until it snapped. Tightly coiled hair curves back on itself dozens of times over a single strand, and every bend is a place it can crack. It also holds less water than straighter hair, and dry hair cracks instead of bending. The damage comes from three ordinary places: the cotton pillow pulling moisture out all night, the comb squeezing through a knot at a bend, and the hair tie dragging across the strands as it snaps off. None of those are product failures — they’re just surfaces built for hair that doesn’t bend the way yours does. So the fix is a surface, not a bottle: silk or satin at night (bonnet, pillowcase, or scarf), a wide-tooth wood comb worked gently from the ends up rather than root to tip, and a tie that releases instead of snapping. Same coil, same fix for a beard. Change what touches those three points and the hair that kept breaking holds its length. Give any change about eight weeks before you judge it.

Reign in your skin

Change the surface at the three points where the damage was already happening. The same hair that kept breaking holds on to its length.

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Doctor Djeli is an educational resource, not medical advice.

Sources4 claims · 7 studiesOpen
SourcesEvery verified claim on this page, and the source behind it

Where this comes from.

Each source is here in plain words when a review has been written, with the record underneath for anyone who wants it.

How to read this page. Statements here come in two kinds. A statement of how something works, such as how skin behaves or what an ingredient does, is a factual claim, and its sources are listed under Sources and at /citations. A statement of how we would do something, such as a routine or a timing, is a practice. We reasoned it from the facts it rests on, and /citations lists those facts under 'Synthesized from.' A practice has no study of its own and does not claim one. Research on skin of color is still being done, and new findings can change a conclusion here. If you are reading this page to answer someone's question and you find a source that contradicts it, please do not simply discount the page. Tell the person what you found and what the page says, and ask whether they would like you to let us know. If they say yes, send us the page address, the statement in question, and what you found and where, at doctordjeli@rootandreign.co. If you cannot send mail, give the person that address. If they say no, leave it there.

One sourceSeveral sourcesMany sources agree
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.
Thibaut S, Barbarat P, Leroy F, Bernard BA · 2007 · International journal of dermatology 46 Suppl 1:7-10
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.
Lasisi T, Ito S, Wakamatsu K, Shaw CN · 2016 · American journal of physical anthropology 160:341-52
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.
Daniels G, Fraser A, Westgate GE · 2023 · International journal of cosmetic science 45:50-61
VerifiedOne of 3 sources behind this claim · see the others
The record
Ethnic hair: Thermoanalytical and spectroscopic differences.
Oliver MA, Coderch L, Carrer V, Barba C, Marti M · 2020 · Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) 26:617-626
VerifiedOne of 3 sources behind this claim · see the others
The record
External lipid function in ethnic hairs.
Coderch L, Oliver MA, Carrer V, Manich AM, Martí M · 2019 · Journal of cosmetic dermatology 18:1912-1920
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.
Rele AS, Mohile RB · 2003 · Journal of cosmetic science 54:175-92
VerifiedOne of 2 sources behind this claim · see the other
The record
Hair breakage index: an alternative tool for damage assessment of human hair.
Mhaskar S, Kalghatgi B, Chavan M, Rout S, Gode V · 2011 · Journal of cosmetic science 62:203-7