Snapshot
- Overview
- A moisture-binding ingredient that leaves skin feeling soft.
- Category
- Hydration, Skin Conditioning
- Type
- Humectant
Lysine Carboxymethyl Cysteinate
Lysine carboxymethyl cysteinate is a water-soluble salt of lysine and carboxymethylated cysteine used in skincare as a humectant and conditioning aid that binds moisture and improves slip. Distinct topical benefits, though, aren't well documented.
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Our take
Is Lysine Carboxymethyl Cysteinate a Good Ingredient?
This amino-acid salt acts as a basic humectant, which is enough for a Fair rating, but there's limited evidence for distinct skin benefits beyond moisture binding. Sensitive or compromised skin may experience mild stinging or irritation.
What it does
Skin Benefits
Helps skin feel comfortably hydrated and softer after application, though research on distinct topical effects is limited.
Where you'll find it
Uses in Skincare & Cosmetics
Included in lightweight serums and moisturizers to support water-binding and provide a silky application in formulas.
Before you use it
Safety
Generally low risk at typical cosmetic levels. A minority may notice transient stinging or irritation, especially on compromised barriers. No widely recognized regulatory restrictions for cosmetic use.
Products with Lysine Carboxymethyl Cysteinate
