"Soursop, [also known as] guanabana fruit or graviola ... is the part that's eaten—but the leaves are also used to make tea and seasonings, according to Morales. The seeds, however, are toxic ...

The soursop plant, scientifically known as Annona muricata Lin., belongs to the custard apple (Annonaceae) family. It produces large, spine-covered fruit with a distinctive sweet and sour flavor ...