Exfoliators

Removing the dull layer of dead cells on the surface, chemically or physically. Acids do it more evenly than scrubs and without the micro-tears, which is why most of this shelf is acid-based: glycolic and lactic on the surface, salicylic inside the pore, and polyhydroxy acids for skin that reacts. Once or twice a week is enough for most people. Over-exfoliation is the most common self-inflicted skin problem there is.