What it is
Kojyl Carboxy Dipeptide-23 is a laboratory-made conjugate that links a kojic acid-derived (kojyl) group to a short peptide chain. It is incorporated into skincare for its skin-conditioning role, often in products oriented toward a brighter, more even-looking complexion. It does not contribute to UV protection in sunscreen formulas.
Origin & sourcing
Synthetic; manufactured by conjugating a kojic acid derivative with a dipeptide.
Questions everyone asks
Is this a UV filter?
No. It is a peptide-type conditioning ingredient and does not provide sun protection.
What does the kojyl part refer to?
It refers to a kojic acid-derived group built into the molecule alongside a short peptide.