One of the best ways to get your daily dose—at least in skincare form—is via a vitamin C serum so you get a more concentrated formula. Plus, “In a serum format, the molecular structure is in ...

The Vitamin C Glow Serum combines vitamin C and azelaic acid, a gentle chemical exfoliant, ... The formula has 5% vitamin C and hydrating ingredients like jojoba oil and shea butter.

The percentage of vitamin C used in the formula. In general, vitamin C serums with 10 to 30 percent of the ingredient are more likely to be effective on dark spots and ... and and chemical peels.