Snapshot
- Overview
- An amino acid that helps skin hold onto moisture for a plumper look.
- Category
- Hydration, Skin Conditioning, Barrier Support
- Type
- Humectant
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.
Like this ingredient?
Our take
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.
What it does
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.
Where you'll find it
Uses in Skincare & Cosmetics
Included in water-based serums, gels, and moisturizers; also appears in toners to boost hydration.
Before you use it
Safety
Generally well tolerated with low irritation risk in topical products. No notable cosmetic regulatory restrictions for typical use.
Products with Lysine
