Glabridin, a natural flavonoid derived from the root of Glycyrrhiza glabra, is considered one of the most representative active ingredients in glycyrrhizic flavonoids. It typically appears as a light yellow to brownish-yellow powder and is fat-soluble. It is insoluble in water but soluble in organic solvents such as ethanol and propylene glycol. Glabridin is widely used in whitening and spot-lightening skincare products because it effectively inhibits tyrosinase activity and reduces melanin production. It also possesses significant antioxidant, anti-inflammatory, and soothing properties, mitigating UV-induced skin damage and helping maintain healthy, youthful-looking skin.