Sweet potato tubers can be used for sugar, wine and alcohol, starch and pectin. The prepared starch can be made into vermicelli and vermicelli, and delicious dishes can be made. Sweet potato is rich in essential nutrients such as starch, vitamins and cellulose, as well as 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.
The nutritional components of corn are comprehensive, generally containing protein 8.5%, fat 4.3%, sugar 73.2%, calcium 0.022%, phosphorus 0.2 1% and iron 0.00 16%. It also contains carotene, vitamin B 1, B2 and nicotinic acid, as well as sitosterol, lecithin and vitamins. The latest research points out that corn contains a carcinogen-glutathione. Bitter nutritionists at home and abroad give high evaluation to corn, and think that glutathione contained in corn has carcinogenic effect, which can combine with many carcinogens in human body and make these substances lose carcinogenicity; The cellulose contained in corn is a kind of carbohydrate that human body can't absorb, which can reduce the concentration of carcinogens in human intestine and the accumulation of humic substances of intestinal endocrine toxins, thus reducing the incidence of colon cancer and rectal cancer. Lignin contained in corn can increase the activity of "macrophages" in human body by 2~3 times, thus inhibiting the occurrence of cancer; Corn also contains a lot of mineral magnesium, and magnesium in food has obvious anti-cancer effect.