The edible part of each 100g fresh potato block contains 29．5g of carbohydrate, 0．2g of fat, 20mg of phosphorus, 0.8mg of calcium/kloc-0 and 0．4g of iron. These substances play an important role in promoting the activity of human brain cells and secreting hormones, enhancing human disease resistance, improving immune function, and delaying mental decline and body aging.

Extended data:

Three reasons to lose weight by eating sweet potatoes:

1, low in calories and full.

Sweet potato is low in calories and quite full. Whether it is used as staple food or non-staple food, it is a good diet food. The fat content of sweet potato per100g is only 0.2g, which is1/4 of that of rice. Therefore, sweet potato is a leader among low-calorie and low-fat foods.

2, rich in balanced nutrition

Sweet potato also contains balanced nutrients. Such as vitamins A, B, C, cellulose and potassium, iron, copper and other trace elements 10, in which cellulose plays a good role in stimulating intestinal peristalsis and promoting smooth excretion.

3. It can prevent sugar from becoming fat

Because the fiber structure can not be absorbed in the intestine, it has the special function of preventing sugar from becoming fat. Therefore, nutritionists call sweet potato the most balanced health food, and it is also the most ideal and inexpensive diet food.

Baidu encyclopedia-sweet potato