Phenylalanine

Phenylalanine is an essential aromatic amino acid found in proteins and used as a cosmetic ingredient. Formulators include it to support moisturization strategies and round out skin-conditioning amino acid blends in hydrating products.
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Ingredient Snapshot

Overview
An amino acid included to round out hydrating formulas.
Category
Hydration, Skin Conditioning
Type
Humectant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Supports a plump, comfortable feel by aiding skin's hydration balance; evidence as a standalone topical is limited. Can complement other moisturizing ingredients for a softer look.

Uses In Skincare & Cosmetics

Often added to hydrating serums, moisturizers, and sheet masks as part of amino acid complexes to round out moisture care routines.

Comedogenic Rating

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

Safety

Generally regarded as low risk for irritation in cosmetic use. Sensitive individuals should patch test if prone to reactions. No specific cosmetic regulatory restrictions are commonly cited.

Is Phenylalanine a Good Ingredient?

Rated Good because, as an amino acid, it can support moisture balance and skin feel, though solid clinical data for standalone topical effects is limited. It performs best as part of broader hydrating systems, which is why it isn't rated higher.

Products with Phenylalanine

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