Sour sop is the fruit of Annona muricata, a broad-leaf, flowering, evergreen tree.
Sour sop is in the same genus, Annona, as cherimoya and is in the Annonaceae family.
Sour sop contains a significant amount of vitamin C, vitamin B1 and vitamin B2.
Sour sop pulp is sometimes used to make fruit nectar, smoothies, fruit juice drinks, candies, sorbets and ice cream.