A first of its kind Vitamin C serum - clinically proven to brighten, even, and protect, without irritation. Powered by Advanced TFC8® to unlock the full potential of stable, gentle Vitamin C. Advanced TFC8® optimizes skin's renewal processes and enhances formula efficacy, unlocking the full potential of stable, gentle Vitamin C (Ascorbyl Glucoside) with no irritation. Delivers clinically proven, superior brightening results* with a synergistic blend of Ascorbyl Glucoside and Ergothioneine.