Yeast Amino Acids

Yeast amino acids are a ferment-derived blend of free amino acids obtained from cultured yeast. Serums, toners, and moisturizers use them to boost water retention, support conditioning, and complement barrier-care routines.
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Ingredient Snapshot

Overview
Fermented yeast amino acids that boost hydration and conditioning.
Category
Hydration, Skin Conditioning, Barrier Support
Type
Humectant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Helps the skin hold moisture for a smoother look and feel, supporting a resilient surface, and can improve softness without heaviness.

Uses In Skincare & Cosmetics

Common in toners, essences, and moisturizers for daily hydration layers and as a base under serums or treatments.

Comedogenic Rating

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

Safety

Usually low irritation and suitable for regular use; individuals reactive to ferment-derived ingredients may experience mild transient irritation. No common regulatory restrictions for cosmetic use.

Is Yeast Amino Acids a Good Ingredient?

It rates Good because these amino acids support hydration and skin feel in line with known NMF components, though the data vary by blend and are thinner than for top-tier humectants, which is why it stops short of Great.

Products with Yeast Amino Acids

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