PHA
PHA stands for polyhydroxy acid, a gentle member of the acid family used in skincare. It works like a milder version of AHAs, exfoliating the skin’s surface while also helping to attract and hold moisture. Ideal for sensitive or easily irritated skin, it is a popular choice in modern UK beauty routines.
How it works in skincare
In cosmetics and skincare, PHAs such as gluconolactone and lactobionic acid function as chemical exfoliants that loosen the bonds between dead skin cells on the surface, promoting a smoother, brighter complexion. They are larger molecules than AHAs and BHAs, which means they penetrate more slowly and cause less irritation, making them suitable for daily use. PHAs also act as humectants, drawing moisture into the skin, and are known for their antioxidant properties that help protect against environmental stressors.
Key benefits
- Gentle surface exfoliation
- Improves skin smoothness and texture
- Enhances skin hydration
- Helps brighten dull complexion
- Strengthens skin barrier function
- Suitable for sensitive and reactive skin
Best for
sensitive skin, dry skin, mature skin, reactive skin, redness-prone skin
Where it comes from
PHAs are typically derived from natural sources including corn, honey, and certain fruits through a fermentation process that produces gluconolactone and lactobionic acid.