PROTEIN
Biotinoyl Tripeptide-1
- protein
Biotin bonded to a short peptide, included in thinning-positioned products. Evidence for applied biotin changing hair growth is limited.
- products in our library
- 29
- of researched products
- 0.7%
- on the label, in our leave-ins
- usually #30
- most common in
- Leave-in
- 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.
Smaller fragments travel further into the strand.
Read from where it sits on the labels we have, not from the molecule.
| Property | Level | Out of |
|---|---|---|
| Buildup risk | Low | 1 of 5 |
| Rinse-out behaviour | Rinses clean | 5 of 5 |
| Fragment size | Large | 4 of 5 |
| Stiffening potential | Slight | 2 of 5 |
What it does for a formula
What Biotinoyl Tripeptide-1 does
The general function first, then how the role changes by product type where we have researched it.
Sticks to damaged areas of the surface and temporarily firms them.
Welcome on limp or damaged hair, unwelcome on hair that already feels rigid.
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 ? |
|---|---|---|
Leave-in
7 products
|
secondary · #30 | |
Shampoo
6 products
|
secondary · #18 | |
Mask / treatment
5 products
|
secondary · #54 | |
Conditioner
2 products
|
secondary · #15 | |
Styler: mousse
2 products
|
secondary · #22 | |
Co-wash
1 product
|
secondary · #31 | |
Finisher: oil
1 product
|
secondary · #12 | |
Finisher: serum
1 product
|
supporting · #6 | |
Scalp treatment
1 product
|
secondary · #14 | |
Styler: gel
1 product
|
secondary · #39 |
2 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Styler: paste
1 product
|
secondary · #15 | |
Styler: volumizer
1 product
|
secondary · #36 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Leave-in | 7 | 2% | 30 | 7 | secondary |
| Shampoo | 6 | 1% | 18 | 7 | secondary |
| Mask / treatment | 5 | 1% | 54 | 22 | secondary |
| Conditioner | 2 | 0% | 15 | 10 | secondary |
| Styler: mousse | 2 | 1% | 22 | 15 | secondary |
| Co-wash | 1 | 1% | 31 | 31 | secondary |
| Finisher: oil | 1 | 1% | 12 | 12 | secondary |
| Finisher: serum | 1 | 1% | 6 | 6 | supporting |
| Scalp treatment | 1 | 1% | 14 | 14 | secondary |
| Styler: gel | 1 | 1% | 39 | 39 | secondary |
| Styler: paste | 1 | 1% | 15 | 15 | secondary |
| Styler: volumizer | 1 | 2% | 36 | 36 | secondary |
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 | 0 |
| 4-8 | Supporting | 4 |
| 9-15 | Secondary | 9 |
| 16-25 | Lower | 6 |
| 26+ | Trace | 21 |
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.
Who should pay attention
Conditional formulation guidance, scoped to a hair condition and to the positions where it is meaningful. It is not a conclusion about any finished product, and not a conclusion about you.
Unhydrolysed protein is too large to enter the strand. It sits on the surface, which is a coating effect rather than internal reinforcement.
A large surface-depositing protein. If protein reliably makes your hair feel rigid, this is the form most likely to do it.
Read where it is listed in the first three ingredients or positions 4–8.Read from this ingredient’s chemical class. Where we have researched the ingredient itself, that reading replaces the class one.
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.
- temporary strength on damaged hair
- 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 protein, listed below the main ingredients in our leave-ins
- it was on the label of every product we counted — we read printed ingredient lists, not marketing copy
- stiffness — only how much of it there is does that
- 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.
- Butylene Glycol · 25
- Apigenin · 22
- Oleanolic Acid · 22
- PEG-40 Hydrogenated Castor Oil · 22
- PPG-26-Buteth-26 · 21
- Helianthus Annuus (Sunflower) Seed Oil · 10
- Disodium EDTA · 10
- Lactic Acid · 9
- Benzyl Benzoate · 9
- Propanediol · 9
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to carry the formula and let it dry, keep the formula stable, and appear on the label as plant-derived ingredients.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Verb · Finisher
Density Peptide Hair Serum
#6 on the label · $22.00/oz
PATTERN · Leave-in
Repair360® Leave-in Foam
#7 on the label · $8.18/oz
Vegamour · Shampoo
GRO+ Advanced Balancing Shampoo
#7 on the label
Kevin Murphy · Shampoo
STIMULATE-ME.WASH
#9 on the label · $4.38/oz
Not Your Mother's · Leave-in
Way To Grow Leave-In Conditioner
#9 on the label · $1.46/oz
Kevin Murphy · Conditioner
PLUMPING.RINSE
#10 on the label · $5.68/oz
Moroccanoil · Scalp treatment
Oily Scalp Treatment
#11 on the label · $28.00/oz
As I Am · Finisher
Bond Repair Hair Oil
#12 on the label · $5.00/oz
Verb · Shampoo
Density Peptide Shampoo
#12 on the label · $1.83/oz
KilgourMD · Scalp treatment
The Prevention Scalp Serum
#14 on the label
Blind Barber · Styler
Advanced Volumizing Foam
#15 on the label · $15.88/oz
See all 29 products in the library that list Biotinoyl Tripeptide-1
Identity
What this entry is, and what our references call it.
Biotinoyl Tripeptide-1
- CAS 299157-54-3
- PubChem 11534242
- vitamin
- biotinoyl tripeptide-1
For your hair?
Whether Biotinoyl Tripeptide-1 matters for your hair depends on your hair.
29 products in our library list itWhat 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 11534242, CAS 299157-54-3, C24H38N8O6S · accessed 2026-08-28
How this page was made
- Every number above is counted from the ingredient lists in our own product library — 29 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.