Graviola (Annona muricata) - Graviola tree (Annona muricata), also known as soursop, is found in the Amazon jungle and some of the Caribbean islands. Graviola tree leaves have been used traditionally for their various therapeutic properties. More recent scientific studies suggest that Acetogenins, the active constituents of Graviola, can support healthy cell growth and function. In addition, Graviola has been used for its whole body calming effects and as a supplement to Enhance maintain a positive mood.