Tired of uneven skin tone and persistent dark spots? Cysteamine is a clinically proven ingredient that works beneath the surface to visibly reduce hyperpigmentation, melasma, and discoloration that other treatments can’t touch. Originally developed for medical use, this powerhouse antioxidant rebalances pigment production for a clearer, more uniform complexion—without the irritation of harsher alternatives. If you’ve tried everything, it’s time for something that works.