Glycolic acid is an excellent treatment for fading dark pimple marks Prevents future acne breakouts. Prevents hyperpigmentation Glyco 6 Cream is a skin cream which is used for the treatment of skin dryness, acne, and hyperpigmentation. It contains Glycolic Acid as an active ingredient which is an alpha-hydroxy acid that exfoliates the skin and makes it brighter. Glycolic acid helps in treating hyperpigmentation by suppressing the formation of melanin (skin pigment) by inhibiting tyrosinase activity. It also exfoliates the skin by enhancing the desquamation of the upper skin layer.