Ingredient library
Biotin-linked tripeptide
INCI: Biotinoyl Tripeptide-1
Biotin-linked peptide (Widelash / Procapil-class) that conditions the lash line and ties biotin into the peptide complex for fuller-looking results.
Evidence and limitations
Manufacturer/supplier data supports Biotinoyl Tripeptide-1 in hair-conditioning complexes (Croda Widelash; also used in Procapil); published evidence is largely scalp-hair / manufacturer panel based, with limited independent lash-specific data.