Lysine Carboxymethyl Cysteinate is an amino acid-derived ingredient combining lysine with a carboxymethyl cysteine moiety, used in skincare for its antioxidant and conditioning properties. It is thought to help support the skin's defense against oxidative stress and may aid in skin conditioning.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation or redness | Rare | Generally well tolerated; transient irritation possible in sensitive individuals. |
| Contact allergic reaction | Very rare | Isolated potential for sensitization, as with most topical amino acid derivatives. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.