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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Ingredient Snapshot

Overview
A moisture-binding ingredient that leaves skin feeling soft.
Category
Hydration, Skin Conditioning
Type
Humectant

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Helps skin feel comfortably hydrated and softer after application, though research on distinct topical effects is limited.

Uses In Skincare & Cosmetics

Included in lightweight serums and moisturizers to support water-binding and provide a silky application in formulas.

Comedogenic Rating

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

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.

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.

Products with Lysine Carboxymethyl Cysteinate

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