"C" Enhance-25 Serum

If your skin has been proven to handle high amounts of vitamin C without irritation, this 25% ascorbic acid is a good next step. This glow-boosting serum calls on brightening vitamin C and licorice plus free-radical fighting ferulic acid. The opaque pump packaging keeps the serum potent - meaning it really is good till the last drop. Apply after cleansing or after your toner on dry skin. Avoid using other active ingredients like benzoyl peroxide, AHAs, BHAs or retinol in the same routine to limit irritation. Top it off with a broad-spectrum sunscreen in the daytime.