According to the "Compendium of Materia Medica", "Compendium of Materia Medica Gleanings" and other ancient literature, the sweet potato has a "fill the lack of deficiency, the benefit of energy, strengthen the spleen and stomach, strong kidneys Yin," the effect of the person "longevity and less disease! It can make people "live longer and have fewer diseases". It can also tonify the middle, harmonize blood, warm the stomach, and fatten the five organs. Contemporary "Chinese Materia Medica" says its: "Sweet in flavor, flat in nature. Attributes to the spleen and kidney meridians." "Nourishes the middle and harmonizes the blood, benefits the qi and promotes the production of fluids, broadens the intestines and stomach, and relieves constipation. Mainly treats spleen deficiency and edema, sores and swollen poisons, intestinal dryness and constipation."
Sweet potatoes are rich in starch, dietary fiber, carotene, vitamins A, B, C, E, and potassium, iron, copper, selenium, calcium and other 10 kinds of trace elements and linoleic acid, etc., with high nutritive value, which is known as the most balanced nutritional health food by nutritionists. These substances can maintain the elasticity of blood vessels, very effective in the prevention and treatment of habitual constipation in old age. Unfortunately, most people think that eating sweet potatoes will make people fat and dare not eat. In fact, on the contrary, eating sweet potatoes not only will not get fat, on the contrary, can lose weight, health, prevent sub-health, laxative detoxification. Each 100 grams of fresh sweet potato contains only 0.2 grams of fat, producing 99 kilocalories of calories, probably for rice 1 / 3, is a very good low-fat, low-calorie food, but also can effectively prevent the sugar into fat, is conducive to weight loss, bodybuilding. Sweet potato contains a lot of dietary fiber, in the intestinal tract can not be digested and absorbed, can stimulate the intestinal tract, enhance peristalsis, laxative detoxification, especially for senile constipation has a better effect. Eat sweet potatoes should pay attention to must be steamed and boiled through. Eating sweet potatoes should not be excessive, Chinese medicine diagnosis of wet obstruction of the spleen and stomach, gas stagnation and food accumulation should be eaten with caution.