Rhapontigenin has antioxidative, antihyperlipidemic, antifungal and anticancer activities. Rhapontigenin inhibits HIF-1α accumulation and angiogenesis in PC-3 prostate cancer cells, suppresses breast cancer cell migration and invasion, which is involved in inhibiting the PI3K-dependent Rac1 signaling pathway. Rhapontigenin exhibits dose-dependent inhibition of tyrosinase activity and melanin synthesis in B16F10 melanoma cells.