A small 2004 study found that using 5% ascorbic acid cream — a form of vitamin C ... ingredients such as vitamin C and retinol. 5. Azelaic Acid How to use it: Azelaic acid can be found ...

Skinoren is a 20% azelaic acid cream which works to kill spot-causing bacteria and it can help reduce redness, too. Duac gel is a benzyl peroxide-based product that I was told to apply directly to ...

One beauty writer reviews this skin-perfecting serum created by one of the most sought-after estheticians in the world.