Snapshot
- Overview
- Soy-derived amino acids that draw in moisture for smoother skin.
- Category
- Hydration, Skin Conditioning, Barrier Support
- Type
- Humectant
Soy Amino Acids
Soy amino acids are the free amino acids obtained by hydrolyzing soy protein for use in cosmetics. They're included to attract moisture, improve surface suppleness, and improve the feel of skin and hair in lightweight formulas.
Like this ingredient?
Our take
Is Soy Amino Acids a Good Ingredient?
It rates Good because hydrolyzed soy amino acids function as effective humectants that improve surface hydration with low irritation risk and broad formulation compatibility. Evidence supports moisturizing benefits, though strong clinical outcomes are limited, which keeps it below Great.
What it does
Skin Benefits
It helps draw in and hold water for a plumper, smoother appearance, and can make hair feel silkier and easier to detangle.
Where you'll find it
Uses in Skincare & Cosmetics
It's common in hydrating serums, leave-on moisturizers, and hair conditioners, and also added to gentle cleansers to help reduce post-wash tightness.
Before you use it
Safety
It's generally safe for most users and unlikely to irritate. Those with soy allergy should be cautious, although the hydrolyzed, low-molecular-weight nature reduces sensitization potential.
