Ingredient index

Salicylic acid

A beta hydroxy acid that is oil-soluble, so it works inside the pore rather than only on the surface.

Use it: No standard schedule
Evidence: strong

Sources

Glycolic Acid Peels Versus Salicylic-Mandelic Acid Peels in Active Acne Vulgaris and Post-Acne Scarring and Hyperpigmentation - Dermatologic Surgeryrct

Salicylic acid: what it does, when to use it, what not to pair it with - BeautyTalks