Polyhydroxy Acid (PHA)
A chemical exfoliant efficient on the skin surface due to its large molecular size, with effects similar to those of the Alpha Hydroxy Acid. Most common derivatives in skincare include gluconolactone and lactobionic. It can help lessen the appearance of spots, even out skin tone, exfoliate dead skin, and give the skin a brighter complexion. PHA also has antioxidant and humectant properties.