2. Star Fruit
A perfect blend of sweet and sour, this succulent fruit constitutes only 31 calories for every 100 grams. The ideal fruit to aid your digestion, the consumption of this fruit makes it possible for you to avoid illnesses such as Irritable Bowel Syndrome and chronic constipation. The skin of this fruit has an incredibly high content of fiber whereas the pulp is rich in tannins that boost metabolism. Also, it contains a wide variety of vitamins and minerals.