murphySilk Amino Acids
AKA: Hydrolyzed Silk, Silk Proteins
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Synthetic
Humectant
Skin Conditioner
Hair Care
Amino Acid
Acid
Clean
Origin-Derived (silkworm)
Protein hydrolyzates, silk
CAS #
96690-41-4
Skin Types
●all-skin-types
Best For
Dehydration
Pregnancy & Breastfeeding Safe
Yes
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks In Moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 625)
Not an Eye Irritant
1 study / 1 not irritating (CIR 625)
Concentration Guide
Leave-on0.00008–0.1%
Rinse-off0.001–0.2%
0%50%100%
CIR reported use · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR