According to Wikipedia, the soursop is a broadleaf flowering evergreen tree native to Mexico, Central America, the Caribbean and northern South America. Soursop is also native to Sub-Saharan Africa countries that lie within the tropics. Today, it is also grown in some areas of Southeast Asia. It is in the same genus as the chirimoya and the same family as the pawpaw. In most Spanish speaking countries it is commonly known as Guanábana. In the Philippines, it is known as guyabano and in Portugese it is graviola.

The soursop is adapted to areas of high humidity and relatively warm winters, temperatures below 5 °C will cause damage to leaves and small branches, and temperatures below 3 °C can be fatal.

Its flavor is described as a combination of strawberry and pineapple with sour citrus flavor notes contrasting with an underlying creamy flavor reminiscent of coconut or banana.

Soursop As A Juice, Shake, Etc.

The soursop or graviola fruit can be made into fruit juice or a shake.  The is tree is low and you can reach the fruit easily.  The fruit is very large and the sub acid sweet white pulp is eaten out of hand.
                                                                           

The most significant part of this plant is because of its strong anti-cancer effects. Although it is effective for a number of medical conditions, it is its anti tumor effect that is of most relevant.  This plant is a proven cancer.  This fruit is a miraculous natural cancer cell killer 10,000 times stronger than chemotheraphy. This is a remedy for all types of cancer. 
                                                                           
Besides being a cancer remedy, graviola is a wide range of antimicrobial agent for both bacterial and fungal infections, is effective against internal worms and parasites, lowers
high blood pressure and is used for stress, depression and nervous disorders.

Now that you know all of these, you can help a friend in need by letting him know or just drink some graviola juice yourself as prevention from any cancer or diseases.  The taste is not bad after all.  It's completely natural and definitely has no side effects.