Vitamin C is one of the most clinically proven antioxidants in skincare, shielding skin against free radical damage, reducing melanin formation that causes dark spots, and stimulating collagen production for smoother, firmer skin over time. The catch: pure vitamin C (L-ascorbic acid) is exceptionally unstable. In pre-mixed formulas it begins degrading on contact with air, light, and water, often reaching your skin at a fraction of its labeled concentration.
Exponent uses 10% L-ascorbic acid, the concentration clinically shown to deliver meaningful brightening and collagen benefits without irritation, preserved as a dry powder and activated fresh at the moment of use.