PROTEIN
Hydrolyzed Collagen
- protein
An animal-derived protein used for body and a smoother surface.
- products in our library
- 103
- of researched products
- 2%
- on the label, in our conditioners
- usually #12
- most common in
- Conditioner
- in water
- Water-soluble
At a glance
Four things worth knowing about how this ingredient behaves on hair.
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 | Small | 2 of 5 |
| Stiffening potential | Slight | 2 of 5 |
What it does for a formula
What Hydrolyzed Collagen 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.
Fragments that attach to worn areas of the strand, where protein does its work.
The film is what holds a shape once the water has gone.
Charge
Charge is not recorded for this ingredient.
Solubility
Rinses out with water alone, so it does not build up 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 ? |
|---|---|---|
Conditioner
28 products
|
secondary · #12 | |
Shampoo
18 products
|
secondary · #9 | |
Mask / treatment
15 products
|
secondary · #17 | |
Leave-in
13 products
|
secondary · #14 | |
Heat protectant
5 products
|
secondary · #13 | |
Finisher: oil
4 products
|
secondary · #9 | |
Styler: mousse
4 products
|
secondary · #13 | |
Dry shampoo
3 products
|
secondary · #12 | |
Finisher: serum
2 products
|
secondary · #14 | |
Scalp treatment
2 products
|
secondary · #12 |
8 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Styler: volumizer
2 products
|
secondary · #25 | |
Co-wash
1 product
|
secondary · #15 | |
Finisher: end oil
1 product
|
leading · #2 | |
Finisher: shine spray
1 product
|
leading · #2 | |
Styler: curl cream
1 product
|
secondary · #24 | |
Styler: gel
1 product
|
supporting · #6 | |
Styler: lotion
1 product
|
secondary · #13 | |
Styler: texture spray
1 product
|
secondary · #16 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Conditioner | 28 | 2% | 12 | 6 | secondary |
| Shampoo | 18 | 1% | 9 | 5 | secondary |
| Mask / treatment | 15 | 3% | 17 | 2 | secondary |
| Leave-in | 13 | 2% | 14 | 4 | secondary |
| Heat protectant | 5 | 2% | 13 | 4 | secondary |
| Finisher: oil | 4 | 1% | 9 | 5 | secondary |
| Styler: mousse | 4 | 2% | 13 | 6 | secondary |
| Dry shampoo | 3 | 2% | 12 | 9 | secondary |
| Finisher: serum | 2 | 1% | 14 | 10 | secondary |
| Scalp treatment | 2 | 1% | 12 | 9 | secondary |
| Styler: volumizer | 2 | 1% | 25 | 15 | secondary |
| Co-wash | 1 | 1% | 15 | 15 | secondary |
| Finisher: end oil | 1 | 13% | 2 | 2 | leading |
| Finisher: shine spray | 1 | 1% | 2 | 2 | leading |
| Styler: curl cream | 1 | 0% | 24 | 24 | secondary |
| Styler: gel | 1 | 0% | 6 | 6 | supporting |
| Styler: lotion | 1 | 3% | 13 | 13 | secondary |
| Styler: texture spray | 1 | 1% | 16 | 16 | 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
Every listing in our library, by position on the label.
| Positions | Zone | Listings |
|---|---|---|
| 1-3 | Leading | 4 |
| 4-8 | Supporting | 27 |
| 9-15 | Secondary | 34 |
| 16-25 | Lower | 31 |
| 26+ | Trace | 7 |
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
Formulation guidance for specific hair conditions, limited to the label positions where it applies. It is not a conclusion about any finished product, or about you.
Filling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.
Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.
Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.
How rigid the finish is depends on which polymer it is and what the formula pairs with it, not on there being one.
Hair that reliably stiffens after protein reacts to a prominent hydrolysed protein first; near the top of a list is where it is most likely to be felt.
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 seeing this ingredient tells you, what it does not, and the limits of our own method.
- temporary strength on damaged hair
- a protein that binds to damaged hair
- a style that holds
- a rinse-clean feel
- 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
- a secondary protein, listed below the main ingredients in our conditioners
- it was on the printed ingredient list of every product we counted (we read labels, not marketing copy)
- that it repairs hair permanently
- stiffness (that depends on how much of it there is)
- 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.
- Butylene Glycol · 45
- Ethylhexylglycerin · 45
- Dimethicone · 42
- Biotin · 37
- Disodium EDTA · 35
- Cetrimonium Chloride · 31
- Propylene Glycol · 30
- Behentrimonium Chloride · 24
- Benzyl Alcohol · 24
- Cetyl Alcohol · 23
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, soften the strand, and smooth the surface.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Aphogee · Mask / treatment
Two-Step Protein Treatment
#2 on the label
Aphogee · Mask / treatment
Two-Step Treatment/Balancing Moisturizer Duo Packette
#2 on the label · $6.11/oz
Mielle Organics · Finisher
Rice Water Hair Split End Therapy
#2 on the label · $3.00/oz
NatureLab. Tokyo · Finisher
Perfect Shine Oil Mist
#2 on the label · $5.00/oz
Hask · Leave-in
Biotin Boost 5-in-1 Leave-in Spray
#4 on the label · $1.17/oz
Joico · Heat protectant
YouthLock Blowout Crème Formulated with Collagen
#4 on the label · $4.75/oz
LUSETA · Shampoo
Biotin & Collagen Shampoo Bar
#5 on the label · $3.98/oz
OGX · Finisher
Thick & Full Biotin & Collagen Weightless Oil Mist
#5 on the label · $2.55/oz
Equate · Conditioner
Biotin & Collagen Conditioner for Hair Care
#6 on the label · $0.18/oz
Hask · Conditioner
Thicken + Biotin & Collagen Conditioner
#6 on the label · $0.56/oz
Neutrogena · Conditioner
Hair Restore Strength + Hydrating Repair Conditioner
#6 on the label · $0.74/oz
Neutrogena · Shampoo
Hair Restore Strength + Purity Shampoo
#6 on the label · $0.74/oz
See all 103 products in the library that list Hydrolyzed Collagen
Identity
What this entry is, and what our references call it.
No public-domain structure depiction is available for this entry.
Hydrolyzed Collagen
- film former
- hydrolysed protein
- hydrolyzed collagen
- hydrolyzed marine collagen
For your hair?
Whether Hydrolyzed Collagen matters for your hair depends on your hair.
103 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 comes from the ingredient lists in our library and from published references. The consultation is what turns it into a plan.
References
Seed entry, sourcing in progress Written from our reference work; primary sourcing is still being attached.
No published source is attached to this entry yet.
How this page was made
- Every number above is counted from the ingredient lists in our own product library: 103 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.
