Polyhydroxy Acids (PHAs)

What is Polyhydroxy Acids (PHAs)?

Polyhydroxy acids (PHAs) are chemical exfoliants similar to alpha hydroxy acids (AHAs), but with larger molecules that penetrate the skin more slowly. This makes PHAs a gentler option for exfoliation, ideal for sensitive skin. PHAs work to remove dead skin cells, promote cell turnover, and improve skin texture without causing the same level of irritation associated with stronger acids like glycolic acid.

Why do I have an intolerance?

Though rare, some individuals may develop intolerance to PHAs, experiencing mild irritation, tingling, or redness. This reaction is usually due to the exfoliating action of PHAs, which may be too strong for very sensitive skin types, particularly if overused or combined with other exfoliating agents.

What can I do about it?

If you’re intolerant to PHAs, limit usage to once or twice a week, or try gentler exfoliants like lactic acid or enzyme-based exfoliants. Always follow up with a hydrating moisturizer to support the skin barrier. Choosing formulations with lower PHA concentrations can help mitigate potential irritation, allowing you to still benefit from gentle exfoliation.