Papain

Papain is a proteolytic enzyme extracted from the latex of unripe papaya fruit (Carica papaya), belonging to the cysteine protease family. In cosmetic formulations, it functions as a gentle yet effective exfoliant by selectively breaking down keratin proteins in dead skin cells without damaging living tissue, making it particularly valuable for sensitive skin formulations. Formulators choose papain over other enzymes because it remains active across a broader pH range and provides both exfoliating and mild antimicrobial benefits, while its natural origin appeals to clean beauty formulations.