Sweet potato storage and nutritional content

Sweet potatoes are delicious. They can be cooked whole and eaten that way. They are very sweet, or they can be used to make sweet soup, both are good.

sweet potato

Also known as sweet potato, sweet potato, yam, etc., it is an annual plant of the Convolvulaceae family. People in different regions call it differently. People in Shandong call it sweet potato, people in Sichuan call it red potato, people in Beijing call it white potato, and people in Fujian call it sweet potato. Sweet potato is native to America and was brought back to Europe by Columbus for planting. It was later introduced to Africa by the Portuguese and then to Asia. Sweet potato was first introduced to my country during the Wanli period of the Ming Dynasty.

Sweet potatoes are rich in nutrients, containing starch, dietary fiber, carotene, vitamins A, B, C, E and more than ten trace elements such as potassium, iron, copper, selenium, calcium and linoleic acid. They have high nutritional value and are called by nutritionists the most nutritionally balanced health food.

Sweet potatoes are not only healthy food, but also a good medicine for curing diseases. Ancient documents such as "Compendium of Materia Medica" and "Supplement to Compendium of Materia Medica" record that sweet potatoes have the effects of "replenishing deficiency, strengthening qi and strength, strengthening spleen and stomach, and strengthening kidney yin", making people "live longer and have fewer diseases", and can also replenish the middle, harmonize blood, warm the stomach, and nourish the five internal organs. "In addition, in the "ranking list" of 20 anti-cancer vegetables recently released by the National Cancer Research Center of Japan, sweet potatoes topped the list.

The shortcoming of sweet potatoes is the lack of protein and lipids, but eating milk and sweet potatoes at the same time can make up for this deficiency because milk is rich in protein and fat.

Sweet potato benefits

1. Sweet potatoes have high-quality protein, which can make up for the nutritional deficiencies in rice and white flour. Regular consumption can improve the body's utilization of nutrients in staple foods, making people healthy and prolonging life.

2. Sweet potatoes contain a lot of fiber, which is very beneficial for promoting gastrointestinal motility and preventing constipation. It can be used to treat hemorrhoids and anal fissures, and it also has a certain effect on preventing rectal cancer and colon cancer.

3. Dehydroepiandrosterone is a unique ingredient of sweet potatoes. This substance can prevent cancer and prolong life. It is a steroid similar to the hormone secreted by the adrenal glands. Foreign scholars call it a "fake hormone." It can effectively inhibit the occurrence of breast cancer and colon cancer.

4. Sweet potatoes have a special protective effect on human organs. They can inhibit the deposition of cholesterol, maintain blood vessel elasticity, prevent atrophy of connective tissue in the liver and kidneys, and prevent the occurrence of collagen diseases.

Storage instructions

You can wrap the sweet potatoes in newspaper and place them in a cool place. They can be stored for about 3 to 4 weeks. If you spread the sweet potatoes on newspapers to dry in the sun before wrapping them, and then wrap them up with newspapers, the sweet potatoes will be sweeter. In addition, unpeeled sweet potatoes should not be refrigerated to avoid excessive moisture.

Sweet potato cooking knowledge

Sweet potatoes must be steamed and cooked thoroughly before eating. First, the starch cell membrane in sweet potatoes is difficult to digest without being destroyed by high temperature; second, the "gasification enzyme" in sweet potatoes is not destroyed by high temperature, which will cause discomfort after eating.

Sweet potato diet taboos

1. Sweet potatoes contain gasifying enzymes, which can easily cause heartburn and acid reflux after eating. This can be effectively avoided by eating them with rice and flour.

2. Sweet potatoes should not be eaten with persimmons. Sweet potatoes contain more starch, which will produce a lot of stomach acid after eating, while persimmons contain more pectin and tannins, which will neutralize the acid and alkali and easily produce coagulation, forming gastric persimmon stones.

Candied Sweet Potato

Ingredients: sweet potato, 500 grams of vegetable oil, 150 grams of white sugar.

practice:

1. Cut the sweet potatoes into cubes and soak them in water to remove the starch on the surface and prevent them from turning black during frying.

2. Heat the oil until it is 70% cooked, add the sweet potatoes and fry until they become soft.

3. Pour off the oil and wash the pot. Add 100 grams of water and stir the sugar after the water boils. When the sugar turns yellow, add the sweet potatoes to the pot. When the sweet potatoes are surrounded by sugar, you can pick them up.

Note: Don’t add too much water, otherwise the silk won’t come out.