20% Vitamin C Serum with Vitamin E & Ferulic Acid -1 oz/30ml

Clinically-proven 20% L-ascorbic acid + 1% vitamin E + 0.5% ferulic acid ratio boosts antioxidant protection by 8x. Neutralizes free radicals from UV/smog better than pure vitamin C alone (Journal of Cosmetic Dermatology 2023).

Lightens post-inflammatory hyperpigmentation by 42% in 12 weeks (user study). PH 2.3-2.8 ensures optimal absorption without irritation when used correctly.

Stimulates collagen production while reducing MMP-1 enzyme activity - the dual action that decreases fine lines depth by 1.02mm in 3D imaging tests.