PHAs are keratolytic agents suitable for all skin types, even those that are sensitive, unlike AHAs and BHAs. Indeed, due to their high molecular weights, they remain on the surface of the epidermis. This explains their good skin tolerance compared to other acids that penetrate deeper into the epidermis.
There are numerous PHAs, here are two particularly common in cosmetic formulas:
To fade the brown marks left by acne, these peeling agents work by breaking down the bonds between the most superficial skin cells to reorganize the epidermis. They thus accelerate the peeling process and induce the rapid dispersion of melanin granules within the keratinocytes.
In other words, the application of PHA triggers a controlled exfoliation of the epidermis, and with it, the melanocytes and the marks left by pimples.
Thus, cosmetic treatments based on acids (A.H.A., B.H.A., and P.H.A.) at low concentrations (up to 20%) can be used to diminish the appearance of post-inflammatory hyperpigmentation marks. However, several applications at a regular pace will be necessary to achieve visible results. In this regard, you can use our anti-mark serums. It specifically targets acne marks and is applied locally. It contains gluconolactone mentioned above and an extract of Centella asiatica, an active ingredient known to help remodel the texture of marked skin.