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.
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Ingredient Snapshot

Overview
Soy-derived amino acids that draw in moisture for smoother skin.
Category
Hydration, Skin Conditioning, Barrier Support
Type
Humectant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

It helps draw in and hold water for a plumper, smoother appearance, and can make hair feel silkier and easier to detangle.

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.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

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.

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.

Products with Soy Amino Acids

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