While glycolic acid and salicylic acid are both popular skin care ingredients and can provide exfoliation, they each have unique properties and benefits.
Glycolic acid is an alpha hydroxy acid (AHA) that works by sloughing dead skin cells from the top layer of your skin while retaining moisture. It works for skin that is dull or uneven, prone to hyperpigmentation, or showing signs of aging.
Salicylic acid is a beta hydroxy acid (BHA) that is used to prevent and treat acne. It’s also an exfoliant that helps shed dead skin cells. But unlike glycolic acid, salicylic acid is oil-soluble making it effective at removing excess sebum, reducing sebum production, and unclogging pores. It works on oily and acne-prone skin, as well as skin that is sensitive or prone to skin conditions like rosacea.
Both glycolic acid and salicylic acid can increase sun sensitivity, so it’s important to use sunscreen when using products that contain either one to decrease sun damage.