PHA skincare claims: is gentle a guarantee?

PHAs (polyhydroxy acids) are generally gentler than other exfoliating acids, but their effects can vary depending on your skin type and the product formulation. ## What are PHAs? PHAs are a type of chemical exfoliant that work by gently dissolving dead skin cells, promoting smoother and brighter skin. They are larger molecules than AHAs (alpha hydroxy acids) and BHAs (beta hydroxy acids), which means they penetrate the skin more slowly and are less likely to cause irritation. ## Are PHAs always gentle? While PHAs are known for being mild, they may still cause sensitivity in some individuals, especially if used incorrectly or in high concentrations. Factors like skin type, existing skin conditions, and the presence of other active ingredients in a product can influence how your skin reacts. ### How to use PHAs safely 1. Patch test first: Apply a small amount of product to your inner arm or behind your ear and wait 24 hours to check for any adverse reaction. 2. Start slow: Begin with a low concentration (5% or less) and use it once or twice a week to see how your skin responds. 3. Moisturise: Always follow up with a hydrating moisturiser to support your skin barrier. 4. Avoid overuse: Don’t combine PHAs with other exfoliants like retinoids or AHAs/BHAs unless advised by a dermatologist. ### Practical takeaway If you’re new to PHAs, choose a product with a low concentration and incorporate it gradually into your routine. Always listen to your skin—if you experience redness, stinging, or irritation, reduce usage or discontinue. For personalised advice, consult a dermatologist.