Purple potatoes have high nutritional value. Purple potatoes are rich in selenium and anthocyanins. Selenium is an anticancer substance, and anthocyanin is an organic active antioxidant that can fight cancer and prevent aging.

Purple potatoes, also known as black potatoes, have purple to dark purple flesh. It is rich in selenium and anthocyanins in addition to the nutrients of ordinary sweet potatoes. Purple potato is one of the main raw materials of anthocyanin.

It is rich in protein, starch, pectin, fiber, amino acids, vitamins and a variety of minerals, but also rich in selenium and anthocyanins. Purple potatoes are rich in nutrients with special health functions, the protein amino acids are very easy to be digested and absorbed by the human body. Rich in vitamin A can improve vision and skin mucous epithelial cells, vitamin C can make the normal synthesis of collagen, to prevent the occurrence of scurvy, anthocyanin is a natural strong free radical scavenger. In addition to the nutrients of ordinary sweet potatoes, it is also rich in selenium, iron and anthocyanins.

In the Japanese National Vegetable Cancer Research Center announced the anti-cancer vegetables in the top of the list. In addition, purple sweet potatoes can also be peeled and dried and crushed and processed into powder, beautiful color, rich in nutrients, is an excellent food processing raw materials, can be used as a variety of pastries as the main ingredient or ingredient. At the same time purple sweet potato will also become one of the main raw materials of anthocyanin. Purple sweet potato from stem tip tender leaves to potato, have certain health care function, is the current pollution-free, green, organic food in the food.

Eating taboos

Purple potatoes contain oxidizing enzymes, easy to produce gas, eat too much will be bloating, abdominal rolling, erosion, fart.

Purple potato sugar content is high, eat more can stimulate the secretion of large amounts of gastric acid, make people feel heartburn.

Dampness obstructs the spleen and stomach, stagnation of qi and food accumulation should be eaten with caution.

Just avoid eating purple potatoes alone, you should eat with high-quality protein food, nutrition is more comprehensive.

Just eat raw. The purple potatoes should be cooked before eating, because the starch grain without high temperature destruction is difficult to digest.

Selenium and iron in purple potatoes is the body's anti-fatigue, anti-aging, blood necessary elements, especially selenium is known as the "king of anti-cancer", easy to be absorbed by the human body, can be left in the serum, repairing the heart muscle, enhance the body's immunity, remove the body's free radicals, inhibit the synthesis of DNA in the cancer cells and the division of the cancer cell growth, preventing stomach cancer, liver cancer and other cancerous diseases. It can prevent the occurrence of stomach cancer, liver cancer and other cancerous diseases.

Purple potatoes are rich in fiber, which can increase the volume of feces, promote gastrointestinal peristalsis, clean up the mucus, gas, and rotting materials in the intestinal cavity, discharge toxic substances and carcinogenic substances in feces, keep the stools unobstructed, improve the environment of the digestive tract, and prevent gastrointestinal diseases from occurring. In addition to the nutrients of ordinary sweet potatoes, it also contains polysaccharides, flavonoids, and is also rich in selenium and anthocyanins, which have the function of preventing high blood pressure, reducing liver dysfunction, and fighting cancer.

Sweet potato, scientific name: sweet potato also known as yam, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato, Zhu yam, cushion potato, kudzu, white yam, fennel yam groundnuts, red skinned sweet potatoes, yam (dialect), moe sweet potato and so on.

Sweet potato is rich in protein, starch, pectin, fiber, amino acids, vitamins and a variety of minerals, "longevity food" reputation. Sugar content of 15-20%. There are anti-cancer, heart protection, prevention of emphysema, diabetes, weight loss and other effects. The Ming Dynasty Li Shizhen "Compendium of Materia Medica" recorded that "sweet potatoes fill the deficiency, strengthen the spleen and stomach, strong kidney yin", and said that the people in the sea eat long life. Chinese medicine regard sweet potato as good medicine.

Sweet potato root contains 60%-80% water, 10%-30% starch, 5% sugar and a small amount of protein, oil, cellulose, hemicellulose, pectin, ash, etc., if 2.5Kg of fresh sweet potatoes folded into 0.5Kg of grain, its nutrients in addition to fat, protein, carbohydrates, etc. content are higher than the rice, flour, and the protein composition of sweet potatoes is more reasonable, high content of essential amino acids. Composition is more reasonable, essential amino acid content is high, especially grain and cereal food in the lack of lysine in the sweet potato content is high. In addition sweet potato is rich in vitamins (carotene, vitamin A, B, C, E), its starch is also easily absorbed by the body.

1. Carotene

Vitamin A is known as "eye protection little guardian", vitamin A is transformed from carotene. Sweet potato is rich in carotene, can provide rich vitamin A, vitamin A content can be as high as 40mg/100g fresh white groundnut, carotene is absorbed by the human body, can be converted into vitamin A. Vitamin A can maintain normal visual function.

2. edible fiber

White groundnut contains fiber equivalent to 10 times the rice flour, its texture is delicate, does not hurt the stomach, can speed up the digestive tract peristalsis, help defecation, clean up the digestive tract, shorten the food toxic substances in the intestinal tract of the retention time, to reduce constipation caused by the human body's own toxicity, to reduce the concentration of intestinal carcinogens, prevention of hemorrhoids and colorectal cancer. At the same time, cellulose can absorb part of the glucose, so that the blood sugar content is reduced, helping to prevent diabetes.

3. Sugar and protein binding substances

White groundnut is rich in mucin, which is a mixture of polysaccharides and proteins, the human body has a special protective effect on the digestive tract, respiratory tract, joint cavities, membrane cavities of the lubrication and elasticity of the blood vessels, due to the substance can prevent substances in the arterial wall of arterial sclerosis caused by the deposition of organs such as the liver and kidneys can prevent the atrophy of connective tissue, can prevent the liver and kidney. Connective tissue atrophy, can slow down the aging of human organs, improve muscle immunity. White groundnut also contains glycoproteins, has a very good anti-mutagenic, hypolipidemic and enhance the role of immunity.

4. Potassium

White groundnut is high in potassium, which can alleviate the ills associated with excessive salt intake. Potassium is also an important factor in protecting the heart. As potassium is an alkaline element, white groundnut has a pH value of 10.31, which makes it a physiologically alkaline food and has a neutralizing effect on body fluids. Appropriate consumption of white groundnut is conducive to maintaining the acid-base balance of the blood, which is beneficial to people's health, development and intellectual development.

5. Anti-cancer substances

White groundnut there is a physiologically active substances called "deoxyepiandrosterone" can prevent colon cancer and breast cancer, brain cells and endocrine glands on the vitality of the endocrine glands have a great role to play in promoting the slow decline in mental ability and increase the body's resistance. Containing more carotene, lysine, plant fiber, dehydroepiandrosterone, can prevent intestinal cancer and breast cancer.

Therapeutic value

Tubers are often in addition to food for consumption, but also sugar and brewing, alcohol, but also starch, pectin extraction, etc., the starch can be made of vermicelli and vermicelli can be made to make delicious dishes. Sweet potato is rich in starch, vitamins, fiber and other essential nutrients, but also rich in magnesium, phosphorus, calcium and other mineral elements and linoleic acid. These substances can maintain the elasticity of blood vessels, and are very effective in combating habitual constipation in old age. Unfortunately, most people think that eating sweet potato will make people fat and dare not eat. In fact, on the contrary, sweet potato is an ideal diet food, its calories only 1/3 of the rice, and because it is rich in fiber and pectin and has a special function to prevent sugar into fat.

Sweet potato is not only a healthy food, or a good medicine to get rid of diseases. According to the Compendium of Materia Medica, sweet potatoes have the effect of "replenishing deficiency, benefiting vitality, strengthening the spleen and stomach, and reinforcing kidney yin". "Sweet potatoes are steamed, cut, sun-dried and harvested, and are used as food, called yam grain, which makes people live longer and less sick." Gleanings from the Compendium of Materia Medica says that sweet potatoes can nourish the middle, harmonize the blood, warm the stomach and fatten the five organs. The Golden Potato Record says that it has six medicinal values: treating dysentery and diarrhea; treating wine accumulation and heat diarrhea; treating dampness-heat and jaundice; treating spermatorrhea and leucorrhea; treating blood deficiency and menstrual disorders; and treating chancre in children. The Lu Chuan Materia Medica says that sweet potatoes can generate fluids and quench thirst, and cure thirst from fever.

Sweet potatoes contain a lot of fiber and pectin that are not easily destroyed by digestive enzymes, which can stimulate the secretion of digestive juices and gastrointestinal peristalsis, thus playing a laxative role. In addition, its rich content of beta-carotene is an effective antioxidant, helping to remove free radicals in the body. In fact, sweet potato is also an ideal food for weight loss.