VITAMIN

Biotin

vitamin

Vitamin B7, included for label appeal in thickening and growth-positioned products. Applied to hair it does not reach the follicle.

554products in our library

8%of researched products

usually #15on the label, in our shampoos

Shampoomost common in

Water-solublein water

products in our library: 554
of researched products: 8%
on the label, in our shampoos: usually #15
most common in: Shampoo
in water: Water-soluble

At a glance

Four things worth knowing about how this ingredient behaves on hair.

Buildup risk Low

How much of it is left on hair between washes.

Rinse-out behaviour Rinses clean

What it takes to get it off the hair again.

Prominence in our shampoos Secondary

Where it sits on the labels we have, in the category it appears in most.

Stated purpose A vitamin

Why a formulator says it is in there.

The same figures as a table. The at-a-glance levels for Biotin.
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.

Included as a vitamin

Usually present in small amounts, below where label order indicates quantity.

Rinses away easily

Water alone removes it, so it does not accumulate between washes.

Charge

Not recorded not recorded for this entry

Charge is not recorded for this ingredient.

Solubility

Water-solubleOil-solubleWater-dispersibleInsolubleVolatile

Rinses out with water alone, so it does not build up on hair between washes.

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 142 products	9%	secondary · #15
Conditioner 113 products	10%	secondary · #15
Scalp treatment 71 products	24%	secondary · #14
Leave-in 51 products	7%	secondary · #15
Mask / treatment 44 products	8%	secondary · #18
Finisher: oil 16 products	6%	secondary · #14
Styler: volumizer 15 products	10%	secondary · #11
Styler: edge control 12 products	32%	secondary · #12
Dry shampoo 11 products	8%	secondary · #12
Finisher: serum 11 products	8%	secondary · #11

Leading 1–3Supporting 4–8Secondary 9–15Lower 16–25Trace 26+

12 more product types

Product type	How common	Typical position on label ?
Heat protectant 11 products	5%	secondary · #21
Styler: curl cream 10 products	4%	secondary · #12
Styler: mousse 10 products	5%	secondary · #13
Styler: gel 7 products	3%	secondary · #23
Styler: hairspray 6 products	2%	secondary · #10
Styler: paste 6 products	3%	secondary · #19
Styler: smoothing cream 4 products	5%	secondary · #21
Co-wash 3 products	3%	secondary · #12
Finisher: shine spray 3 products	3%	secondary · #15
Styler: lotion 3 products	8%	secondary · #25
Styler: refresh spray 3 products	9%	secondary · #9
Styler: texture spray 2 products	2%	secondary · #19

The same figures as a table. Where Biotin sits on the ingredient list, by product type.
Product type	Products	Share of category	Median position	Earliest position	Band
Shampoo	142	9%	15	4	secondary
Conditioner	113	10%	15	5	secondary
Scalp treatment	71	24%	14	3	secondary
Leave-in	51	7%	15	3	secondary
Mask / treatment	44	8%	18	2	secondary
Finisher: oil	16	6%	14	4	secondary
Styler: volumizer	15	10%	11	6	secondary
Styler: edge control	12	32%	12	2	secondary
Dry shampoo	11	8%	12	7	secondary
Finisher: serum	11	8%	11	5	secondary
Heat protectant	11	5%	21	4	secondary
Styler: curl cream	10	4%	12	10	secondary
Styler: mousse	10	5%	13	9	secondary
Styler: gel	7	3%	23	8	secondary
Styler: hairspray	6	2%	10	6	secondary
Styler: paste	6	3%	19	8	secondary
Styler: smoothing cream	4	5%	21	4	secondary
Co-wash	3	3%	12	10	secondary
Finisher: shine spray	3	3%	15	11	secondary
Styler: lotion	3	8%	25	14	secondary
Styler: refresh spray	3	9%	9	7	secondary
Styler: texture spray	2	2%	19	18	secondary

We have not researched differences by product type yet. The reading below comes from where it sits on the labels in our library.

Position footprint

Leading 6Supporting 94Secondary 197Lower 158Trace 99

Every listing in our library, by position on the label.

Every listing of Biotin in our library, grouped by its position on the label.
Positions	Zone	Listings
1-3	Leading	6
4-8	Supporting	94
9-15	Secondary	197
16-25	Lower	158
26+	Trace	99

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 seeing this ingredient tells you, what it does not, and the limits of our own method.

A good sign if you want

a named vitamin on the label
a rinse-clean feel

Less relevant if you want to know

an exact safety score (we do not publish one for any ingredient)
how a finished product performs, which depends on the whole formula, not one line of it
the exact percentage in a bottle, because label position never converts into a number

Seeing it usually means

a secondary vitamin, listed below the main ingredients in our shampoos
it was on the printed ingredient list of every product we counted (we read labels, not marketing copy)

It does not automatically mean

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

The ingredients that most often appear alongside this one in our library. We leave out the near-universal ones, because they pair with everything and tell you nothing.

The number beside a name is how many products in our library list both.

These ingredients tend to appear together to soften the strand, deliver a stated effect, 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.

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

Kevin Murphy · Leave-in NIGHT.SHIFT #4 on the label · $15.68/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

Ouidad · Scalp treatment Curl Therapy Daily Revitalizing Scalp Serum #4 on the label · $22.00/oz

See all 554 products in the library that list Biotin

Identity

What this entry is, and what our references call it.

Canonical name

Biotin

Identifiers

CAS 58-85-5
PubChem 171548

Most-listed rank

#3 of 37 vitamins and actives in our library, by how many products list it

Also listed as

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 library

What this page is

What this ingredient does, and where it sits on the labels we have researched.

What it is not

A verdict on any product that contains it, and never a safety grade.

Next

Build your hair profile and let the whole library sort itself

Use products with this ingredient? Get free recall alerts for them.

We do not physically test your hair. Everything above comes 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: 554 of 6816 researched products list this ingredient. Nothing on this page is written per ingredient.
The dots are levels, not scores. Each one comes from what kind of ingredient it is (its chemical class, charge and solubility) or from where it sits on the labels we have.
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. Without one, we leave the row out rather than fill it in.
This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.
Entry last updated 2026-09-22. Product-page methodology: the product library.

Biotin

What Biotin does

Where it appears

Position footprint

Whether Biotin matters for your hair depends on your hair.

References

This ingredient

How this page was made

Hair Care Consultation