PROTEIN
Silk Amino Acids
- protein
Silk protein broken into amino acids, used for slip and shine rather than strength.
- products in our library
- 162
- of researched products
- 2%
- on the label, in our conditioners
- usually #15
- 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 | Smallest | 1 of 5 |
| Stiffening potential | Slight | 2 of 5 |
What it does for a formula
What Silk Amino Acids 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.
Small enough to travel further into the strand than a whole protein can.
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, 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
31 products
|
secondary · #15 | |
Shampoo
30 products
|
secondary · #16 | |
Leave-in
29 products
|
secondary · #16 | |
Mask / treatment
14 products
|
secondary · #23 | |
Styler: curl cream
13 products
|
secondary · #26 | |
Styler: mousse
12 products
|
secondary · #16 | |
Styler: gel
9 products
|
secondary · #12 | |
Co-wash
4 products
|
secondary · #21 | |
Finisher: shine spray
4 products
|
secondary · #12 | |
Finisher: serum
3 products
|
secondary · #12 |
10 more product types
| Product type | How common | Typical position on label ? |
|---|---|---|
Heat protectant
3 products
|
secondary · #12 | |
Styler: volumizer
2 products
|
secondary · #11 | |
Dry shampoo
1 product
|
secondary · #9 | |
Finisher: anti frizz finish
1 product
|
secondary · #23 | |
Finisher: oil
1 product
|
secondary · #10 | |
Scalp treatment
1 product
|
secondary · #14 | |
Styler: edge control
1 product
|
secondary · #14 | |
Styler: lotion
1 product
|
secondary · #20 | |
Styler: paste
1 product
|
supporting · #8 | |
Styler: refresh spray
1 product
|
secondary · #17 |
| Product type | Products | Share of category | Median position | Earliest position | Band |
|---|---|---|---|---|---|
| Conditioner | 31 | 3% | 15 | 6 | secondary |
| Shampoo | 30 | 2% | 16 | 6 | secondary |
| Leave-in | 29 | 4% | 16 | 5 | secondary |
| Mask / treatment | 14 | 2% | 23 | 9 | secondary |
| Styler: curl cream | 13 | 6% | 26 | 7 | secondary |
| Styler: mousse | 12 | 6% | 16 | 6 | secondary |
| Styler: gel | 9 | 3% | 12 | 8 | secondary |
| Co-wash | 4 | 4% | 21 | 15 | secondary |
| Finisher: shine spray | 4 | 4% | 12 | 7 | secondary |
| Finisher: serum | 3 | 2% | 12 | 12 | secondary |
| Heat protectant | 3 | 1% | 12 | 5 | secondary |
| Styler: volumizer | 2 | 1% | 11 | 8 | secondary |
| Dry shampoo | 1 | 1% | 9 | 9 | secondary |
| Finisher: anti frizz finish | 1 | 3% | 23 | 23 | secondary |
| Finisher: oil | 1 | 0% | 10 | 10 | secondary |
| Scalp treatment | 1 | 0% | 14 | 14 | secondary |
| Styler: edge control | 1 | 3% | 14 | 14 | secondary |
| Styler: lotion | 1 | 3% | 20 | 20 | secondary |
| Styler: paste | 1 | 1% | 8 | 8 | supporting |
| Styler: refresh spray | 1 | 3% | 17 | 17 | 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 | 0 |
| 4-8 | Supporting | 27 |
| 9-15 | Secondary | 57 |
| 16-25 | Lower | 52 |
| 26+ | Trace | 26 |
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.
Amino acids are the smallest protein fraction and bind water as well, so they add far less stiffness than a hydrolysed protein does.
The lightest option in the protein family, but still protein — worth watching if protein reliably stiffens your hair.
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.
- the lightest protein option
- temporary strength on damaged hair
- a light protein
- 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)
- 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.
- Ethylhexylglycerin · 74
- Aloe Barbadensis Leaf Juice · 58
- Disodium EDTA · 47
- Propylene Glycol · 46
- Benzyl Alcohol · 45
- Cetyl Alcohol · 44
- Cetrimonium Chloride · 42
- Olea Europaea (Olive) Fruit Oil · 41
- Hexyl Cinnamal · 40
- Polyquaternium-10 · 38
The number beside a name is how many products in our library list both.
These ingredients tend to appear together to soften the strand, give the formula body and hold, and keep the formula stable.
Found in these products
The most prominent placements first. The badge is the position on that product’s own ingredient list.
Alikay Naturals · Leave-in
Lemongrass Leave-In Conditioner
#5 on the label · $1.34/oz
Curl Keeper · Heat protectant
Heat Shield Curl Protector
#5 on the label · $2.67/oz
Curl Keeper · Leave-in
Unwind - Extreme Detangling Jelly
#5 on the label · $2.42/oz
Camille Rose · Styler
Guava Slip The Hold Up Setting Mousse
#6 on the label · $2.43/oz
CHI · Conditioner
Color Illuminate Conditioner - Coffee Bean
#6 on the label · $2.00/oz
CHI · Conditioner
Color Illuminate Conditioner - Dark Chocolate
#6 on the label · $2.00/oz
CHI · Conditioner
Color Illuminate Conditioner - Platinum Blonde
#6 on the label · $2.00/oz
CHI · Conditioner
Color Illuminate Conditioner - Red Auburn
#6 on the label · $2.00/oz
CHI · Conditioner
Color Illuminate Conditioner - Silver Blonde
#6 on the label · $2.00/oz
Curl Keeper · Shampoo
Revive & Thrive - Treatment Shampoo
#6 on the label · $2.50/oz
Design Essentials · Leave-in
Bamboo & Silk HCO Leave-In Conditioner
#6 on the label · $2.19/oz
CHI · Conditioner
Color Illuminate Conditioner - Lavender Plum
#7 on the label · $2.00/oz
See all 162 products in the library that list Silk Amino Acids
Identity
What this entry is, and what our references call it.
No public-domain structure depiction is available for this entry.
Silk Amino Acids
- amino acid
- silk amino acid
- silk amino acids
- silk amino acids (natural protein)
For your hair?
Whether Silk Amino Acids matters for your hair depends on your hair.
162 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: 162 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.
