VITAMIN
Biotin
- vitamin
Vitamin B7, included for label appeal in thickening and growth-positioned products. Applied to hair it does not reach the follicle.
- products in our library
- 262
- of researched products
- 7%
- on the label, in our shampoos
- usually #14
- most common in
- Shampoo
- in water
- Water-soluble
At a glance
Four named levels, read from this ingredient’s chemical class, its charge, its solubility, or where it sits on the labels we have. More dots means more of the property named — never “better”.
How much of it is left on hair between washes.
What it takes to get it off the hair again.
Where it sits on the labels we have, in the category it appears in most.
Why a formulator says it is in there.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Low | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Prominence | Secondary | 2 of 5 |
| Stated purpose | A vitamin | 3 of 5 |
What it does for a formula
What Biotin does
The general function first, then how the role changes by product type where we have researched it.
Usually present in small amounts, below where label order indicates quantity.
Water alone removes it, so it does not accumulate between washes.
Charge
Charge is not recorded for this ingredient.
Solubility
Rinses out with water alone — it does not accumulate on hair between washes.
Where it appears
Where it appears
One row per product category in our library: how many products list it, what share of that category that is, and where it typically sits on the label.
| Product type | How common | Typical position on label ? |
|---|---|---|
Shampoo
69 products
|
secondary · #14 | |
Conditioner
68 products
|
secondary · #13 | |
Leave-in
30 products
|
secondary · #14 | |
Mask / treatment
21 products
|
secondary · #20 | |
Scalp treatment
21 products
|
secondary · #17 | |
Styler: volumizer
9 products
|
secondary · #11 | |
Heat protectant
8 products
|
secondary · #22 | |
Styler: mousse
8 products
|
secondary · #13 | |
Finisher: oil
5 products
|
secondary · #12 | |
Finisher: serum
5 products
|
secondary · #15 |
8 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Styler: edge control
5 products
|
secondary · #12 | |
Co-wash
3 products
|
secondary · #12 | |
Styler: gel
3 products
|
secondary · #12 | |
Styler: smoothing cream
2 products
|
secondary · #24 | |
Styler: texture spray
2 products
|
secondary · #19 | |
Styler: curl cream
1 product
|
secondary · #11 | |
Styler: lotion
1 product
|
secondary · #25 | |
Styler: paste
1 product
|
supporting · #8 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Shampoo | 69 | 8% | 14 | 2 | secondary |
| Conditioner | 68 | 10% | 13 | 5 | secondary |
| Leave-in | 30 | 7% | 14 | 3 | secondary |
| Mask / treatment | 21 | 5% | 20 | 2 | secondary |
| Scalp treatment | 21 | 13% | 17 | 6 | secondary |
| Styler: volumizer | 9 | 14% | 11 | 6 | secondary |
| Heat protectant | 8 | 6% | 22 | 4 | secondary |
| Styler: mousse | 8 | 6% | 13 | 9 | secondary |
| Finisher: oil | 5 | 3% | 12 | 4 | secondary |
| Finisher: serum | 5 | 6% | 15 | 8 | secondary |
| Styler: edge control | 5 | 31% | 12 | 2 | secondary |
| Co-wash | 3 | 3% | 12 | 10 | secondary |
| Styler: gel | 3 | 2% | 12 | 8 | secondary |
| Styler: smoothing cream | 2 | 4% | 24 | 22 | secondary |
| Styler: texture spray | 2 | 3% | 19 | 18 | secondary |
| Styler: curl cream | 1 | 1% | 11 | 11 | secondary |
| Styler: lotion | 1 | 8% | 25 | 25 | secondary |
| Styler: paste | 1 | 1% | 8 | 8 | supporting |
No product-type differences have been researched yet — the reading below is computed from where it sits on the labels in our library.
Position footprint
Every listing in our library, by position on the label.
| Positions | Zone | Listings |
|---|---|---|
| 1-3 | Leading | 8 |
| 4-8 | Supporting | 56 |
| 9-15 | Secondary | 108 |
| 16-25 | Lower | 94 |
| 26+ | Trace | 49 |
How to read this
US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order.
So position tells you about relative amount only above that line, and we never convert a position into a percentage.
Why it matters to shoppers
What this ingredient is evidence of, what it is not evidence of, and what our own method can and cannot tell you.
- a named vitamin on the label
- a rinse-clean feel
- an exact safety score — we do not publish one, for any ingredient
- how a finished product performs by itself — that is the whole formula, not one line of it
- the exact percentage in a bottle — label position never converts into a number
- a secondary vitamin, listed below the main ingredients in our shampoos
- it was on the label of every product we counted — we read printed ingredient lists, not marketing copy
- that a product is right or wrong for you
We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
Commonly paired with
Ingredients that appear alongside this one most often in our library. Near-universal ingredients are excluded — they pair with everything and tell you nothing.
- Tocopheryl Acetate · 87
- Cetrimonium Chloride · 76
- Benzyl Alcohol · 76
- Disodium EDTA · 69
- Niacinamide · 68
- Caprylyl Glycol · 68
- Cocos Nucifera (Coconut) Oil · 64
- Behentrimonium Chloride · 64
- Sodium Chloride · 63
- Cetyl Alcohol · 63
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to deliver a stated effect, improve feel after rinsing, and carry the formula and let it dry.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
amika · Shampoo
Big Hit Volumizing Shampoo
#2 on the label · $3.15/oz
Equate · Shampoo
Equate Beauty Moisture Rich Shampoo with Vitamin E
#2 on the label · $0.10/oz
Soultanicals · Mask / treatment
Fro Despair, Vitamin Hair Repair Mega DC
#2 on the label
TGIN · Styler
Miracle RepaiRx Smooth & Protect Edge Control
#2 on the label · $2.75/oz
Hask · Leave-in
Biotin Boost 5-in-1 Leave-in Spray
#3 on the label · $1.17/oz
Marc Anthony · Scalp treatment
Grow Long Scalp & Hair Serum
#3 on the label · $4.49/oz
Ouidad · Leave-in
VitalCurl+ Leave-In Styling Serum
#3 on the label · $3.06/oz
Palmer's · Mask / treatment
Bond Repair Complex Pre-Shampoo
#3 on the label
IGK · Scalp treatment
Hair Density Scalp Treatment
#4 on the label · $21.43/oz
Marc Anthony · Heat protectant
Grow Long Anti-Frizz Shield Ultimate Blowout Spray
#4 on the label · $1.57/oz
Marc Anthony · Styler
Instantly Thick +Biotin Plump & Lift Styling Cream
#4 on the label · $1.65/oz
OGX · Finisher
Thick & Full Biotin & Collagen Weightless Oil Mist
#4 on the label · $2.55/oz
Identity
What this entry is, and what our references call it.
Biotin
- CAS 58-85-5
- PubChem 171548
- biotin
- biotin (b7)
- biotin (vitamin b7)
- biotin (vitamin h)
For your hair?
Whether Biotin matters for your hair depends on your hair.
the 3rd most-listed vitamin or active in our libraryWhat this ingredient does, and where it sits on the labels we have researched.
A verdict on any product that contains it, and never a safety grade.
We do not physically test your hair. Everything above is read from the ingredient lists in our library and from published references — the consultation is what turns it into a plan.
References
Sourced Backed by a manufacturer or regulatory source.
This ingredient
- Manufacturer or regulatory PubChem — Compound identity: CID 171548, CAS 58-85-5, C10H16N2O3S · accessed 2026-08-28
How this page was made
- Every number above is counted from the ingredient lists in our own product library — 262 of 3889 researched products list this ingredient. Nothing on this page is written per ingredient.
- The dots are named levels read from an ingredient’s chemical class, charge, solubility, or where it sits on the labels we have — never a score.
- US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Position tells you about relative amount only above that line, and we never convert a position into a percentage.
- The prominence bands (leading, supporting, secondary) are the same ones the product pages use to read a single label, applied here to the median position across a category.
- We do not publish safety scores or hazard grades. Where a regulator has published a restriction or a use condition, we state it and cite it; otherwise we describe what the ingredient does and stop.
- Identifiers and references appear only when a published source is attached to this entry; where none is, the row is simply absent rather than filled in.
- This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
- Entry last updated 2026-08-28. Product-page methodology: the product library.