SkinCeuticals Blemish + Age Defense is an oil-free serum formulated to address both acne and signs of aging. Its unique blend of 2% dioic acid, 1.5% salicylic acid, 3.5% glycolic acid, and 0.5% citric acid helps reduce excess oil, unclog pores, and improve skin texture. This serum is ideal for adult skin experiencing breakouts and visible signs of aging.