Ingredient · INCI listed
Vitamin C (L-Ascorbic Acid)
Vitamin C is a potent antioxidant that neutralizes free radicals, brightens skin tone, stimulates collagen production, and enhances UV protection when used under sunscreen. L-ascorbic acid is the most studied form.
Evidence — Well-established
Data summary
Products containing
48
Most common in
20 products
serums
Typical pairing
Hyaluronic Acid
Evidence level
Well-established. Most effective at 10-20% concentration, pH below 3.5. Unstable in water — look for formulas with vitamin E and ferulic acid (the Duke antioxidant patent) for better stability and efficacy.
Verified reviewer
Where it shows up
