Glabridin (CAS NO: 59870-68-7) is a flavonoid extracted from the roots of Glycyrrhiza glabra (licorice), renowned in cosmetics for its potent skin-brightening and antioxidant properties. As a white to pale yellow crystalline powder, it inhibits tyrosinase activity to reduce melanin production, making it a key ingredient in whitening formulations. Its stability in both aqueous and oil-based systems, combined with low irritation, has positioned it as a preferred choice for sensitive and pigmented skin care.