Graviola is an evergreen plant from Central and South America whose fruit is source of vitamin C, B1, B2 and phosphorus. All parts of the tree had been used in natural medicine, while the maximum amount of the Acetogenin contain graviola leaves of which are exclusively made this dietary supplement. How does it work Graviola contains many chemicals that may be active against cancer, as well as disease-causing agents such as bacteria, viruses, and parasites.