Soy Amino Acids
AKA “Soybean Amino Acids”
Acid
Ingredient Facts
Soy amino acids
AKA: Soybean Amino Acids
Acid · Hair Conditioning · EWG: 1
Synthetic
Skin Conditioner
Hair Care
Amino Acid
Acid
Clean
Soy Amino Acids is a mixture of amino acids derived from the complete hydrolysis of soy protein
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
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Soy
EWG
1
CIR
Safe as used
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 Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR