Isdin Pigment Expert Correcting Serum acts against the signs of photoaging ing thanks to glycolic acid (GAc), which exerts a gentle exfoliating action that removes superficial cells from the skin, improving oxygenation and enhancing cell proliferation and improves the synthesis of collagen fiber, Dipotassium glycyrrhizate (DpG), which maintains the content of hyaluronic acid, restoring the skin's flexibility. It has an important depigmenting action, also it reduces the number and intensity of skin blemishes and prevents their appearance thanks to its exclusive Pigment Block component, which is the result of the combination of depigmenting components such as 4-n-butyl resorcinol, hydroxy acid.