Gluconolactone is a polyhydroxy acid, or PHA, renowned for its ability to delay the signs of ageing such as wrinkles and fine lines. It is also known for its moisturising benefits on the skin. Thus, this ingredient is a valuable ally for dry and mature skin. It also has benefits for the hair. The following question arises: what is "Gluconolactone" and what is its utility? Let's focus.