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If you are trying to lose weight, graviola offers a unique, satisfying, low-calorie snack. A cup of graviola pulp has 148 calories, with 2.25 grams of protein and less than a gram of fat. Although it is high in natural sugar, with 30.5 grams, graviola can help you feel full for longer because cup has 7.4 grams of fiber, far surpassing the fiber content of an apple or a bowl of bran cereal.

Graviola displays cancer-preventive properties, according to researchers from the University of Nebraska who published a study in the journal "Cancer Letters" in 2012. They evaluated graviola extract and found that it contains compounds that play a role in regulating the metabolism, survival and growth of cancer cells, shrinking tumors and reducing cancerous cells' ability to grow and spread. Another study, published in "Nutrition and Cancer" in 2011, determined that taking 200 daily milli-grams of graviola extract for 5 weeks inhibited the growth of breast cancer tumors. These findings may indicate that graviola offers protection against some forms of cancer.

Graviola is a valuable source of B-complex vitamins. Each cup gives you about 10 percent of the thiamin, riboflavin, folate, vitamin B-6 and niacin you need each day. These nutrients benefit your metabolism by helping your body convert food into energy. A cup of raw graviola also provides one-half of your recommended daily intake for vitamin C, an antioxidant that helps prevent premature aging and benefits your cells, immune system and overall health.

Although fruit is often low in essential minerals, graviola is rich in them. Snacking on a cup of graviola can benefit your circulatory system, muscles, bones and nerve function, while helping to keep your blood pressure at a healthy level. It provides about 14 percent of the magnesium, 12 percent of the potassium and 10 percent of the phosphorus you should get daily. It also has 1.35 milligrams of iron, or about 16 percent of a man's daily requirement for iron and about 7 percent of the iron a woman needs each day.