Lysine

Lysine is an essential alpha-amino acid used as a water-soluble cosmetic ingredient. In formulas it binds moisture and keeps a smooth, supple feel while supporting barrier comfort.
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Ingredient Snapshot

Overview
An amino acid that helps skin hold onto moisture for a plumper look.
Category
Hydration, Skin Conditioning, Barrier Support
Type
Humectant

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Helps skin retain moisture for a plumper, refreshed appearance and supports a smoother-looking surface, contributing to a comfortable feel in dehydrated areas.

Uses In Skincare & Cosmetics

Included in water-based serums, gels, and moisturizers; also appears in toners to boost hydration.

Comedogenic Rating

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

Safety

Generally well tolerated with low irritation risk in topical products. No notable cosmetic regulatory restrictions for typical use.

Is Lysine a Good Ingredient?

Lysine is a skin-compatible amino acid that supports hydration as part of skin's natural moisturizing factors, with a low likelihood of irritation, which earns it Good. The effects are modest, though, and rely on formulation synergy rather than strong standalone activity.

Products with Lysine

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