Lactic acid is an anti wrinkle and pigmentation-fighting ingredient found in over-the-counter (OTC) and professional-grade skin care products. Derived from milk, lactic acid belongs to a class of anti-aging ingredients called alpha-hydroxy acids (AHAs). Other examples of AHAs include glycolic acid and citric acid.
Lactic acid brightens, smooths, and evens skin, while also making it look firmer. It helps reduce the appearance of fine lines, wrinkles, and dark spots. How does it work exactly? It exfoliates by loosening the bonds between dead skin cells to reveal a more radiant complexion.