Soyamidopropyl Betaine
AKA: Soy Betaine, Soybean Amidopropyl Betaine
Allergen Warning
⚠️ Soy
Synthetic
Cleanser
Skin Conditioner
Hair Care
Amino Acid
Not Clean
1-Propanaminium, 3-amino-N-carboxymethyl-N,N-dimethyl-, N-soybean-acyl derivs., hydroxides, inner salts
CAS #
61789-40-0
Form
Liquid
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
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.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Locks in moisture
Traditional Use
A modern synthetic ingredient derived from soybean oil and betaine. Developed as a mild surfactant for use in shampoos and cleansing products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR