If I were to rifle through your current skincare lineup, I’d bet I’d find at least one of the following: salicylic acid, glycolic acid, or lactic acid. Thanks to brands like The Ordinary, Paula’s Choice, and Drunk Elephant, exfoliating acids have become staples in many routines. (Don’t ask me to pick a favorite — I’m loyal to all three.) From unclogging pores to fading hyperpigmentation and brightening dull skin, their benefits are well documented, but there’s another acid quietly vying for your attention, and if you have sensitive skin, might just replace what you’re using now.