It is done in four to six sessions at two to four week intervals. Dead skin and dryness tidy up together over two to four weeks, because two steps follow on: the dead-skin layer loosens and lifts gradually, and moisture is then filled in on top. Being gentle, it needs the full course to show.

It uses a gentle ingredient with large molecules that absorb slowly, so almost no flaking occurs. Because it does not all enter at once, it does not sting either. There is no downtime and you can wear make-up the same day, and it suits dry skin that wants to avoid the irritation of peeling.

GA peel has small molecules that dissolve dead skin quickly, so the effect is clear but it is irritating. PHA has large molecules that absorb slowly, so it is gentler, and a hydrating step is built in. For fast change choose GA peel; if dryness and sensitivity are the worry, PHA.