Peter Thomas Roth Glycolic Acid 10% Clarifying Gel.Ideal for normal, aging, oily, combination or problem skin that may also be environmentally-damaged. Contains no oil or fatty acids. Excellent for T-zone oiliness. Helps reduce appearance of fine lines, wrinkles and other signs of aging. Helps clarify the skin, increase cell turn-over and smooth out a rough texture. Dry skin types may also want to apply a moisturizer or hydrator. Not for extremely sensitive skin.