The anti-aging effects of alpha-hydroxy acids (AHAs) on skin were first reported in the seventies and have been widely investigated and clinically tested ever since.
There is a new generation of hydroxy acids - poly hydroxy acids (PHAs) - have now been also proven to provide anti-aging effects with milder side effects than AHAs.
A clinical study conducted to directly compare the benefits of AHAs and PHAs for anti-aging effects showed equivalent benefits of PHAs in most categories while reducing irritation and degree of sensitivity as shown below.
What we like the most about PHAs: