



How salicylic acid works on clogged pores, how strong the acne evidence really is, what Health Canada’s acne monograph allows, and who should be careful with it.
How glycolic, lactic and salicylic acid exfoliate, which one suits which skin, why they make you sun-sensitive, how often to use them, and Canada’s rules on strength.
How retinoids work on acne and aging skin, why retinol is a cosmetic while adapalene and tretinoin need a prescription in Canada, and how to handle irritation, sun and pregnancy.
How to pick a cleanser, moisturizer and leave-on products for acne-prone skin: light textures, what “non-comedogenic” and “oil-free” signal, and when to see a doctor.