Sweet potatoes are rich in starch, dietary fiber, carotene, vitamins A, B, C, E, as well as more than 10 kinds of trace elements such as potassium, iron, copper, selenium, calcium and linoleic acid. The family called it the most balanced health food. These substances can maintain the elasticity of blood vessels, and are very effective in preventing and treating habitual constipation in the elderly.
Sweet potatoes are rich in carotene, which can promote the normal maturation of epithelial cells, inhibit abnormal differentiation of epithelial cells, eliminate carcinogenic oxygen free radicals, prevent carcinogens from binding to proteins in the nucleus, and promote the enhancement of human immunity.
Sweet potatoes are the best food source of β-carotene, which helps the body produce enough white blood cells to fight infections caused by cold virus invasion.
Sweet potatoes contain a lot of dietary fiber, which cannot be digested and absorbed in the intestine, can stimulate the intestine, enhance peristalsis, detoxify, and have a good effect on senile constipation. Most people now have indigestion and constipation. Prolonged constipation is likely to cause gastrointestinal cancer. And sweet potatoes are rich in crude fiber, which can promote bowel movements.
Sweet potatoes are rich in sugar, cellulose and multi-vitamin nutrition, especially β-carotene, vitamin E and vitamin C.
Cellulose and pectin
Sweet potatoes are rich in cellulose and pectin. These substances can stimulate digestive juice secretion and gastrointestinal motility. Coupled with its high nutrition, low calorie and low fat characteristics, it has a good protective effect on blood vessels.
Especially sweet potatoes are rich in lysine, while rice and flour lack lysine. But many people have not realized it yet.
Sweet potatoes also contain a substance similar to estrogen, which has a certain effect on protecting human skin and delaying aging.
Chlorogenic acid in sweet potatoes can inhibit the production of melanin and prevent the appearance of freckles and age spots.
Sweet potatoes contain a lot of mucus proteins, which can prevent the atrophy of the connective tissues of the liver and kidneys, improve the body's immunity, and prevent collagen diseases.
Calcium and magnesium
The calcium and magnesium contained in sweet potatoes can prevent osteoporosis.
Sweet potatoes contain unique biological flavonoids. This substance prevents cancer and prolongs life. It is a steroid similar to the hormone secreted by the adrenal glands. Foreign scholars call it "counterfeit hormone". It can effectively inhibit the occurrence of breast cancer and colon cancer.