For dull skin, use L'Oreal Paris Glycolic Bright Daily Foaming Face Cleanser. This face wash, which is fueled by glycolic acid, effectively cleanses the skin's outermost layer and promotes the appearance of radiant skin. Since glycolic acid is the smallest AHA, skin care products containing it have been shown to absorb into the skin more deeply and quickly. One of the best cleansers for brightening skin is the L'Oreal Paris Glycolic Bright Daily Foaming Face Cleanser, which exfoliates the face and gets rid of dullness for even, luminous skin.