Polyhydroxy Acids
In skincare, PHAs refer to Polyhydroxy Acids. These are a type of chemical exfoliant that belong to the same family as AHAs (Alpha Hydroxy Acids) and BHAs (Beta Hydroxy Acids). What sets PHAs apart though (and makes them an increasingly interesting skincare ingredient for your routine) is that they are particularly gentle acids. That means they can help to exfoliate the skin’s surface, promoting cell turnover and improving the overall texture and appearance of the skin, with less irritation. They are most commonly found in acid toners, but are also cropping up in serums and moisturisers too.