Disclosed herein is a composition that includes a novel combination of triterpenoids for the treatment or prophylaxis of a cancer. The triterpenoids includes at least ganoderic acid S (GAS), ganoderic acid T (GAT), ganoderic acid Me (GAMe), ganoderic acid R (GAR), and ganodermic acid S (GMAS). The composition is suitable for the treatment or prophylaxis of colon cancer, hepatic cancer, breast cancer, lung cancer or leukemia.
