Introduction:

Formerly known as sweet potato, it is also known as sweet potato, sweet potato, sweet potato, yam, sweet potato, sweet potato, sweet potato, sweet potato, pillow potato, kudzu root, sweet potato and fennel taro. Sweet potato belongs to the family Convolvulaceae of the genus Panicum, which is more than 2 meters long and lies on the ground. Its leaves are usually wide oval, 4- 13 cm long and 3- 13 cm wide. Corolla pink, white, lavender or purple, bell-shaped or funnel-shaped, 3-4 cm long, and capsule ovoid or oblate.

Sweet potato tuber is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, and the sugar content is 1.5%-5%.

Sweet potato tubers contain active ingredients, which have the effects of anti-cancer, heart protection, prevention of emphysema, diabetes, weight loss, beauty and so on, and have the reputation of "longevity food". In addition, the root tuber can be used for sugar, wine and alcohol, starch and pectin. The prepared starch can be used to make vermicelli and vermicelli.

Nutritional value:

Sweet potato tuber contains 60%-80% water, 10%-30% starch, about 5% sugar and a small amount of protein, oil, cellulose, hemicellulose, pectin and ash. If 2.5Kg fresh sweet potato is converted into 0.5Kg grain, its nutritional components are higher than rice and flour except fat. In addition, sweet potato is rich in vitamins (carotene, vitamins A, B, C and E), and its starch is easily absorbed by the human body.

Sweet potato is not only rich in essential nutrients such as starch, vitamins and cellulose, but also rich in mineral elements such as magnesium, phosphorus and calcium and linoleic acid. These substances can maintain the elasticity of blood vessels and are very effective in preventing and treating habitual constipation in the elderly. Unfortunately, most people think that eating sweet potatoes will make people fat and dare not eat them. In fact, on the contrary, sweet potato is an ideal diet food, its calorie is only 1/3 of that of rice, and because it is rich in cellulose and pectin, it has the special function of preventing sugar from transforming into fat.

Sweet potato is not only a healthy food, but also a good medicine for treating diseases. Sweet potato contains a lot of cellulose and pectin that are not easily destroyed by digestive enzymes, which can stimulate the secretion of digestive juice and gastrointestinal peristalsis, thus playing a laxative role. In addition, its rich β -carotene is an effective antioxidant, which helps to eliminate free radicals in the body. In fact, sweet potato is an ideal diet food.

Medicinal value:

(1) medicinal efficacy:

Sweet potato contains unique bioflavonoids, which can promote defecation and effectively inhibit the occurrence of breast cancer and colon cancer; It can improve the function of digestive organs, nourish liver and kidney, and effectively treat hepatitis and jaundice.

Sweet potato protein is of high quality, which can make up for the lack of nutrition in rice and white flour. Regular consumption can improve the utilization rate of nutrients in staple food, make people healthy and prolong life.

Sweet potato is rich in dietary fiber, which has the special function of preventing sugar from transforming into fat; Can promote gastrointestinal peristalsis and prevent constipation. Can be used for treating hemorrhoid and anal fissure, and has certain effect on preventing rectal cancer and colon cancer.

Sweet potato has a special protective effect on the mucosa of human organs, which can inhibit the deposition of cholesterol, maintain the elasticity of blood vessels, prevent the atrophy of connective tissue of liver and kidney, and prevent the occurrence of collagen disease.

② Weight loss and beauty:

Whether eating sweet potatoes can make people fat. According to scientific research, eating sweet potatoes will not make people fat. On the contrary, sweet potato is an ideal diet food. Its calories are very low, much lower than ordinary rice. You don't have to worry about getting fat after eating it, but you can lose weight.

Sweet potato also contains a substance similar to estrogen, which has a certain effect on protecting human skin and delaying aging. So many foreign women regard sweet potato as beauty food.

③ Anti-cancer:

Scientists have found that sweet potato contains a chemical called hydroepiandrosterone, which can be used to prevent colon cancer and breast cancer. [3] The most anticancer nutrients in the diet are β -carotene (the precursor of vitamin A), vitamin C and folic acid, and the contents of the three are rich in sweet potatoes.

A small sweet potato (about 2 times) can provide twice the daily vitamin A, one third of the daily vitamin C, and about 50 micrograms of folic acid. The content of dietary fiber is higher than a bowl of oatmeal. Eating sweet potatoes regularly helps to maintain the normal folic acid level of the human body, and low folic acid content in the body will increase the risk of cancer. Sweet potato has high dietary fiber content, which can promote gastrointestinal peristalsis and prevent constipation and colorectal cancer.

Dietary taboos:

1 be sure to eat thoroughly; 2 Eat sweet potato "heartburn" with small pickles; 3 indigestion, eat sweet potatoes carefully; 4 Sweet potatoes and persimmons should not be eaten together.