Soursop is high in vitamin C, an antioxidant known to boost immune health. The vitamin strengthens your immune system, improving its ability to defend against pathogens. It also promotes the destruction of free radicals, which can help to protect your skin and cells from environmental oxidative damage. Soursop (the fruit and the leaves) contains many other antioxidants, including phytosterols, tannins, and flavonoids. Antioxidants play a role in your overall health and may help to protect against a variety of health conditions. Antioxidants fight free radicals, reducing the damage to your cells caused by oxidative stress. One of the side effects of oxidative stress is inflammation. The antioxidants in soursop may, therefore, help to reduce inflammation in the body. Soursop also contains potassium, which helps your body to get rid of sodium and eases the tension in the walls of your blood vessels, both of which can help to lower your blood pressure. Soursop contains many essential vitamins and minerals, including: Vitamin B1, Vitamin B2, Vitamin B3, Vitamin C, Folate Calcium, Iron, Potassium, Magnesium, Phosphorous, Zinc, and Copper. Soursop contains more than 200 phytochemicals, which are compounds that are known to boost your immune system and fight infections and other diseases. Research also shows that soursop has natural cytotoxicity effects., similar to those used in chemotherapy and radiation therapy. Studies show that the fruit also has an ability to reduce the cell growth associated with a number of diseases.