Also known as: PHA, Gluconolactone, Lactobionic Acid
Polyhydroxy acids (PHAs) such as gluconolactone and lactobionic acid are next-generation exfoliants with larger molecular weights than AHAs. They exfoliate more slowly and gently, making them ideal for sensitive, rosacea-prone, or reactive skin. They also function as humectants and antioxidants. PHAs do not increase photosensitivity to the same degree as AHAs.
Comedogenicity ratings are based on the rabbit ear assay model. Individual skin responses vary. See our article on comedogenicity ratings for context.
The Ingredient Journal
Every week we break down one ingredient in depth — the science, the claims, and what the label is not telling you.