Jicama

Jicama is mostly water. It is a good source of dietary fiber, potassium, and vitamin C. It also contains inulin, which is partly responsible for its sweet taste. In addition, inulin increases the absorption of calcium, and possibly of magnesium. Combined with the fiber and water found in jicama, these nutrients help both hydration and blood pressure. Although it is a sweet-tasting source of fiber, it does not appear to raise blood sugar or triglyceride levels.
Nutritional Facts :
Three and one-half ounces of raw jicama provides 46 calories, 10.6 g carbohydrate, 0.86 g protein, 0.11 g fat, 5.8 g dietary fiber, 19 IU vitamin A, 24 mg vitamin C, 8 mcg folic acid, 135 mg potassium, 4 mg sodium, 16 mg phosphorus, 11 mg calcium, and 11 mg magnesium.