Soy Amino Acids
AKA “Soybean Amino Acids
Synthetic
Ingredient Facts
Soy amino acids
AKA: Soybean Amino Acids
Synthetic · Hair Conditioning · EWG: 4
Plant-Derived Synthetic
Skin Conditioner
Hair Care
Amino Acid
Synthetic
Clean
Soy Amino Acids is a mixture of amino acids derived from the complete hydrolysis of soy protein Science: Functions: Hair Conditioning, Skin Conditioning ⚠ Allergen Alert (Soy): Derived from a common allergen source. May cause reactions in sensitive individuals. Safety Ratings: CIR: Safe as used
Effective at 0.1%
CAS #
65072-01-7
See origin →
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.
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
Traditional Use
Extracted from soybean protein in the modern era. Used in skincare products for their humectant and conditioning properties, designed to improve skin hydration and firmness.
Skin Types
all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Soy
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Phototoxicity Concern
Concentration Guide
8e-05%
0.2%
0%100%
Effective Range
CIR reported use: 0.00008-0.2 | 0.02-0.2
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR