PHA (Poly Hydroxy Acids)
The gentlest group of exfoliating acids — like gluconolactone and lactobionic acid — with larger molecules that suit sensitive skin.
Poly hydroxy acids (PHAs) are often described as the gentle cousins of AHAs. They exfoliate in a similar way — loosening the bonds between dead surface cells — but their molecules are larger, so they penetrate more slowly and tend to be better tolerated by sensitive or easily-irritated skin. Common examples include gluconolactone and lactobionic acid.
As well as gently smoothing the surface, PHAs bring a couple of bonus qualities: they act as humectants, helping the skin hold onto water, and some have antioxidant properties. This makes them a thoughtful option if you want the look of smoother, fresher skin without the sting that stronger acids can cause. You'll find them in toners, serums, and moisturisers, sometimes alongside AHAs or BHAs in a blended formula.
PHAs suit people who are new to chemical exfoliation, have reactive or dryness-prone skin, or find AHAs and BHAs too intense. They pair comfortably with hydrating and barrier-supportive ingredients, and while they are gentle, daily broad-spectrum sunscreen remains a smart habit with any exfoliating routine.
Honest limits: because they are gentle, PHAs tend to work gradually and subtly rather than dramatically. If you're after significant resurfacing you may find them mild. As always, patch testing is a kind first step, and persistent concerns are worth discussing with a skincare professional.
As well as gently smoothing the surface, PHAs bring a couple of bonus qualities: they act as humectants, helping the skin hold onto water, and some have antioxidant properties. This makes them a thoughtful option if you want the look of smoother, fresher skin without the sting that stronger acids can cause. You'll find them in toners, serums, and moisturisers, sometimes alongside AHAs or BHAs in a blended formula.
PHAs suit people who are new to chemical exfoliation, have reactive or dryness-prone skin, or find AHAs and BHAs too intense. They pair comfortably with hydrating and barrier-supportive ingredients, and while they are gentle, daily broad-spectrum sunscreen remains a smart habit with any exfoliating routine.
Honest limits: because they are gentle, PHAs tend to work gradually and subtly rather than dramatically. If you're after significant resurfacing you may find them mild. As always, patch testing is a kind first step, and persistent concerns are worth discussing with a skincare professional.
