The papaya fruit is about 88.8% water, 9.8 % carbohydrate, 0.8% fiber, 0.6% protein, 0.6% ash and 0.1% fat. A 100g (3.5 oz.) serving of papaya has 39 calories, compared to banana's 92 calories. Papayas also contain 16% more vitamin C than oranges and are a good source of vitamin A (about half of that contained in mango). Consumption of the fruit is reported to aid digestion because of the papain content.