LACTIC ACID (88% Lactic acid appears clear and has the formula H. It is water-soluble and whitish when solid. It can be created in liquid form, both naturally and synthetically. Lactic acid is used to treat hyperpigmentation, age spots, and other conditions that cause a dull and uneven complexion. Lactic acid can improve skin tone and minimise pores. Compared to glycolic acid, lactic acid is gentler. Lactic acid, an anti-wrinkle and pigmentation-fighting component, can be found in both OTC and professional-grade skincare products.