Sweet potatoes are as follows: 1, sweet potatoes are rich in protein, starch, pectin, fiber, amino acids, vitamins and a variety of minerals, is one of the longevity food, its sugar content of 15%-20%; sweet potatoes are not only more comprehensive nutrition, but also have little-known role in preventing subhealth, such as weight loss, bodybuilding, anti-cancer effects can be reflected in sweet potatoes; 2, sweet potatoes contain a lot of starch, consumption After it is easy to make people feel full, so you can reduce food intake, so there is weight loss patients, you can properly use sweet potatoes instead of staple foods, can achieve weight loss and slimming effect; 3, sweet potatoes contain a lot of dietary fiber, carotene, vitamins, such as vitamin A, vitamin B, vitamin C, as well as potassium, iron, copper and other trace elements, its relatively high nutritional value, known by nutritionists as more balanced food; 4, sweet potatoes after steaming, part of the starch will change, compared with raw food can increase about 40% of dietary fiber, which is conducive to intestinal peristalsis, so some constipation patients can be recommended to eat more.