A supercharge of the most potent form of vitamin C for your serum this powder formula visibly brightens and firms. The addition of ferulic acid gives it further stability and efficacy. "The most effective Vitamin C treatment I've every used." - InStyle. Vitamin C loses potency in liquid form, which is why ours comes in a powder retaining its full power and ready to supercharge your serum. It leaves skin visibly brighter, firmer, smoother, and all-around more youthful. Key ingredients inclyde Vitamin C and Ferulic Acid. True Botanicals Vitamin C Booster Powder (.49 oz | 14 g)