Proline

Proline is a naturally occurring cyclic amino acid found in many proteins. In cosmetics it acts as a water-binding humectant and conditioning ingredient, supporting moisture balance and texture alongside broader amino acid blends.
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Ingredient Snapshot

Overview
An amino acid that helps skin hold moisture and stay supple.
Category
Hydration, Skin Conditioning, Barrier Support
Type
Humectant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Attracts water to help skin feel cushioned and supple, supporting a smoother look. Provides gentle conditioning benefits, especially useful during dryness.

Uses In Skincare & Cosmetics

Found in hydrating serums, sheet masks, and face creams to bolster moisture-focused formulas and round out amino-acid-based blends.

Comedogenic Rating

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

Safety

Generally low irritation and well tolerated, including for sensitive skin. No known photosensitizing or comedogenic concerns at cosmetic use levels.

Is Proline a Good Ingredient?

It's a gentle, water-binding amino acid that supports hydration and conditioning, especially as part of amino-acid blends, which is enough for a Good rating. It's stable in water-based systems, but its standalone effects are modest compared with multi-ingredient humectant systems.

Products with Proline

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