Back to Ingredient Dictionary

PHA

Description

Poly-Hydroxy Acids (PHAs) are a group of gentle exfoliating compounds that have gained prominence in skincare formulations. These second-generation alpha-hydroxy acids offer similar benefits to their AHA counterparts but with reduced irritation potential, making them suitable for sensitive skin types. The most common PHAs include gluconolactone, lactobionic acid, and maltobionic acid.

PHAs function as chemical exfoliants, promoting cell turnover and improving skin texture. Their larger molecular structure limits penetration depth, resulting in a more gradual and less irritating exfoliation process. These acids also possess humectant properties, attracting moisture to the skin and enhancing hydration.

Key benefits of PHAs include improved skin barrier function, enhanced collagen production, and antioxidant effects. They can help address various skin concerns such as fine lines, uneven texture, and hyperpigmentation. PHAs are often incorporated into cleansers, toners, serums, and moisturizers at concentrations ranging from 3% to 10%.

Unlike AHAs, PHAs do not increase photosensitivity, making them suitable for daytime use. However, as with any exfoliant, it's advisable to introduce PHAs gradually and monitor skin response.