Soursop Puree contains acemannan. It is an immune stimulant. It is believed that this content is helpful to boost the making of white blood cells. It strengthens the immune system and boosts body's ability to fight bacterial and viral infections. It was stated by United State's Food and Drug Administration that use of Sour Soup juice in avoiding health problems due to the lowered immunity in the HIV patients. Nowdays Soursop Puree is being studied for its possible use to treat cancers because it has been found to prevent the growth of tumors in rats.