Lysine
INCI: tranexamic acid
Reviewed by Daisy · Last updated 18 Aug 2026
Also known as: lysine HCI, lysine carboxymethyl cysteinate, arginine/lysine polypeptide
Essential amino acid for collagen formation
Addresses
EWG Safety Score
What Is Lysine?
Lysine is an essential amino acid that the body cannot produce on its own, making dietary or topical supplementation necessary. It plays a crucial role in collagen synthesis, serving as a key building block in the collagen molecule's structure.
In skincare, lysine supports the skin's ability to produce and maintain healthy collagen. It also plays roles in calcium absorption and immune function, contributing to overall skin health.
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Lysine is a variant of Tranexamic Acid, the form you will most often see on an ingredients list.
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