Alpha-hydroxy acids (AHAs) Alpha-hydroxy acids are water ... collagen — the protein building block of your skin's structure Reducing the appearance of wrinkles AHA ingredients are often found ...

Alpha hydroxy acids (AHA’s) Dr. Corey L ... Polyhydroxy acid (PHA’s) Polyhydroxy acids (PHA’s) have larger molecular structures and stay in the upper layers of skin. This acid works for ...

Most of these fall into the alpha-hydroxy acid (AHA) bucket. One of the most gentle chemical exfoliants is Polyhydroxy acid (PHA), which has a large chemical structure that prevents it from ...

Meet mandelic, a super gentle acid that has all the hallmarks of other alpha hydroxy acids (AHAs) but crucially, without the risk of redness and irritation. Don’t be fooled by its softly-softly ...