Soursop is the fruit of Annona muricata, a broadleaf, flowering, evergreen tree native to Mexico, Cuba, Central America, the Caribbean, and northern South America. The flavor has been described as a combination of strawberry and pineapple, with sour citrus flavor notes contrasting with an underlying creamy flavor reminiscent of coconut or banana.
The plant is grown as a commercial herb crop for its 20–30 cm (7.9–12 in) long, prickly, green fruit, which can have a mass of up to 15 lb (6.8 kg). The fruit contains significant amounts of vitamin C, vitamin B1 and vitamin B2 - Wikipedia, “Soursop Fruit”
Graviola extracts have demonstrated anticancer properties in laboratory testing, but these extracts have not been properly studied in humans. In its article about graviola, Cancer Research UK notes:
In laboratory studies, graviola extracts can kill some types of liver and breast cancer cells that are resistant to particular chemotherapy drugs. But there haven’t been any large scale studies in humans. So we don’t know yet whether it can work as a cancer treatment or not.
There are many claims that the fruit of the Graviola tree can kill cancer far better than chemotherapy, or can seek out and attack malignant cells. Often times, the reader will find claims that the fruit is 10,000 times more effective than chemotherapy. However, as a 2008 study notes, again:
Graviola demonstrated anticancer effects in vitro, but has not been studied in humans.
Now, having said that, the author of this article urges much more in-depth, human study of potential benefits, and believes the answer indeed lies within our natural environments, but also cautions against our definitions of success. Because a compound is successful in vitro, or, in a petri dish full of cells, does not always translate into success in the human body. This claim that soursop is so much more potent than chemotherapy is derived, in small part, from a 1996