Dried purple sweet potato

　　Selenium-rich purple potato curd

　　Purple potatoes originate from green products in hilly areas of the foothills of the Taihang Mountains. They are planted in non-polluted red sandy soil. They refuse to use chemical fertilizers and use organic fertilizers. Cooperatives with professional teams have unified large-scale planting management. Planting after grain rain and harvesting after frost fall have the characteristics of long growth cycle （spanning nearly three seasons）， abundant sunshine and adequate nutrient absorption.

　　Harvest purple potatoes and make dried potatoes. Factory scale production, closed cooking after the production of dried potatoes, low-temperature natural drying, effectively lock the nutrients. It has the characteristics of low calorie, low fat, high sweetness and toughness. In the process of making dried potatoes, without adding any substances, it is a well-deserved "pure natural, non-added" food.

　　Bulk dried purple potatoes taste sweeter than independently packaged dried potatoes, which are often processed in factories when the purple potatoes are just ripe, and starch has not yet been fully converted into sugar. But the dry bulk potato tastes sweeter when it is dried for a long time.

　　Purple potatoes are rich in selenium and anthocyanins besides the nutritional characteristics of sweet potatoes.

　　Anthocyanins have preventive and therapeutic effects on more than 100 diseases, and are known as the seventh essential nutrient after water, protein, fat, carbohydrates, vitamins and minerals. Anthocyanin is the most direct, effective and safe free radical scavenger found by the scientific community to prevent and treat diseases and maintain human health. Its ability to scavenge free radicals is 20 times that of vitamin C and 50 times that of vitamin E. Purple potato is rich in protein, 18 kinds of amino acids which are easily digested and absorbed by human body, 8 kinds of vitamins such as vitamin C, B, A and 10 kinds of trace elements of natural minerals such as iodine, selenium, potassium, zinc, manganese, lysine, phosphorus and iron. Among them, iron and selenium are abundant. Selenium and iron are essential elements for anti-fatigue, anti-aging and blood replenishment. Especially selenium is known as "the king of anti-cancer", which is easily absorbed by human body. Selenium can be left in serum to repair myocardium, enhance immunity, scavenge free radicals, inhibit the synthesis of DNA in cancer cells and the division and growth of cancer cells, and prevent the occurrence of cancer such as gastric cancer and liver cancer. Purple potato dried stem is rich in cellulose, which can increase the volume of feces, promote gastrointestinal peristalsis, clear mucus, gas and decay in intestinal cavity, discharge toxic and carcinogenic substances in feces, keep feces unblocked, improve the environment of digestive tract, and prevent the occurrence of gastrointestinal diseases.

　　Appendix:

　　Function and efficacy of sweet potato

　　1. Blood tonic: Nutrition is very rich, contains a lot of sugar, vitamins and minerals, can be effectively absorbed by the human body, prevention and treatment of malnutrition, and can supplement the Qi, spleen and stomach deficiency, children's chancre and other diseases.

　　2. Wide intestine and defecation: After cooking, some starch changes. Compared with before cooking, it can increase about 40% of food fiber, which can effectively stimulate intestinal peristalsis and promote defecation. Sweet potato skin exudates a white liquid containing Jasmine glycoside, which can be used to treat habitual constipation.

　　3. Enhance immune function: It contains a lot of mucin, which can prevent the atrophy of connective tissue in liver and kidney, improve the immunity of the body and prevent the occurrence of collagen disease. Minerals play an important role in maintaining and regulating human functions. Calcium and magnesium can prevent osteoporosis.

　　4. Anti-cancer and anti-cancer: It contains an anti-cancer substance, which can prevent and treat colon cancer and breast cancer. In addition, it also has the effect of eliminating reactive oxygen species, which is one of the causes of cancer. Therefore, the effect of inhibiting the proliferation of cancer cells is very obvious.

　　5. Anti-aging and prevention of atherosclerosis: anti-aging and prevention of atherosclerosis effect, mainly its water is produced by reactive oxygen species. Mucous protein in sweet potato can maintain the elasticity of vascular wall and prevent the occurrence of atherosclerosis; chlorogenic acid in it can inhibit the production of melanin and prevent the occurrence of freckles and senile plaques. Digua can also inhibit skin aging, maintain skin elasticity and slow down the aging process of the body.

　　Common Knowledge of Sweet Potato Food

　　1. Don't eat too much at one time. Don't eat on an empty stomach. It contains an oxidase, which easily produces a large amount of carbon dioxide gas in the human gastrointestinal tract. If you eat too much at one time, it will cause abdominal distension. In addition, fasting consumption will stimulate the secretion of gastric acid, making people feel "heartburn".

　　2. The disadvantage is lack of protein and fat, but today people are well-off. Sweet potatoes are no longer the staple food. The nutrients it lacks can be completely supplemented by other diets. So it is the most scientific way to eat sweet potato chips after each meal.

　　3. Should not be eaten with dried persimmon: if eaten at the same time, sugar fermentation in the stomach, will increase gastric acid secretion, and persimmon tannin, pectin reaction precipitation condensation, will make the stomach feel uncomfortable.

　　With the progress of science and technology, sweet potato products emerge in an endless stream. Among them, the most popular is edible sweet potato dried. After cleaning, cooking, the sun will become soft, fragrant, sweet, endless dried potatoes. More rare, potato dried in the process of production, without adding any substances, is a well-deserved "pure natural, no added" food.