Sofie Pavitt is NYC's acne whisperer, and her award-winning mandelic acid serum is a must-try if you're dealing with clogged pores or acne. The Cosmo beauty team is collectively obsessed with how well ...

Why We Love It: Keep redness at bay with The Inkey List's SuperSolutions 10% Azelaic Serum Redness Relief Solution. The azelaic acid-enriched serum—which has a light green hue to help mask ...