Sweet potato, also known as sweet potato, is commonly known as sweet potato. It originated in South America and was brought into China with the development of navigation. At first, it was planted in the southeast coastal areas of China, and gradually spread throughout the country. Therefore, sweet potatoes were called sweet potatoes in Guangdong, Fujian, and Hong Kong. With the improvement of living standards, many people are aware that eating more refined foods, such as fine rice noodles, sweets, and so on, will cause many adverse effects on people's health. As a result, sweet potato foods will change and relief rations from poor years will be changed. It has become one of the health foods on the list.
Sweet potatoes commonly found in the market include sweet potatoes, sweet potatoes, and now popular purple sweet potatoes. In general, sweet potato foods are rich in starch, and the type of starch has a great impact on health. In the starch of the whole potato food, the content of amylose in the potato starch is high, the amylose of the sweet potato (sweet potato, purple sweet potato) is middle, and the amylose content in the tapioca starch is the lowest. Amylose-high foods have less effect on blood glucose fluctuations, which means that the increase in blood glucose is smaller. Therefore, potato and sweet potato are ideal staple foods for abnormal glucose tolerance and diabetes.
The yellower the color, the higher the carotene content
The sweet potato is light in color, has a dry, sweet taste, contains a lot of dietary fiber, and cannot be digested and absorbed in the intestine. It can stimulate intestinal peristalsis and detoxification, especially for elderly constipation.
In addition to a large amount of starch, soluble sugars, various vitamins, and various amino acids, common sweet potato tubers also contain protein, fat, dietary fiber, and calcium, iron, and other minerals. The color of potato meat is related to the content of carotene. The more yellow the color of sweet potato, the higher the content of carotene. Carotene is generally lacking among people who smoke, drink alcohol and eat less vegetables and fruits. The study found that carotene supplementation can effectively reduce the nicotine content of smokers' blood. In addition, carotene can enhance the skin's resistance, prevent canceration and prevent the occurrence of cardiovascular diseases.
"The nutritive value of purple sweet potato is higher than ordinary sweet potato"
Purple sweet potato is a kind of sweet potato, purple and deep purple potato meat. China introduced this variety from Japan in the 1990s. At present, purple potato varieties cultivated in various regions include Japan's Yamatake Purple Potato, American Black Potato, and German Black Potato, etc. China's self-cultivated varieties include Jishu 18 and Jingshu 6 On the 1st, group purple, etc., the shape is divided into purple purple heart purple wisteria, Wisteria red heart white heart type, red heart red wisteria, purple rattan purple heart type, green rattan yellow red heart type.
The purple color of purple sweet potato is natural and belongs to the natural anthocyanin pigment. It exists in the roots, stems, leaves and potato skin of purple sweet potato. The purple sweet potato is soaked in water for a long time, and the water will change color. If the purple sweet potato and rice are cooked together, the rice will be dyed purple, which is a normal phenomenon. The gelatinization temperature of purple sweet potato starch is high, and the degree of swelling and solubility are lower than those of other starches at each temperature. Therefore, the taste of the purple sweet potato starch is relatively less, and the taste is lighter.
The nutrient content of purple sweet potato was significantly higher than that of ordinary sweet potato. The content of lysine, copper, zinc, and potassium was 3 to 8 times higher than that of sweet potato, and the content of selenium and anthocyanin was also abundant. The role of selenium in human health is mainly focused on anti-tumor and improving blood sugar. The study found that patients with coronary heart disease, Keshan disease, Kashin-Beck disease, and cataract generally lack selenium, and selenium has a strong ability to scavenge free radicals in the body and can effectively prevent free radical-induced lipid peroxidation and reduce the related Occurrence of cancer, coronary heart disease, infection, inflammation, etc.
Eat more sweet potato will turn flat
The texture of raw sweet potatoes and cooked sweet potatoes varied greatly. The taste of sweet potatoes in the three sweet potatoes was slightly pale, but they were crisp and juicy, and raw food was better. The sweet potato flavor of yellow heart or red heart is sweet, but the texture is tight and the juice is slightly less. Cooked food is better.
In the Supplement to the "Compendium of Materia Medica", it is mentioned: "Many people should not eat too much and can breathe." Gastric acid should not eat more sweet potato, eat more acid. Excessive consumption of sweet potato will produce a lot of carbon dioxide in the stomach and stomach, causing flatulence or increased gastric acid, causing people to feel heartburn and acid reflux and other symptoms. In addition, the sweet potatoes should be steamed and cooked, or mixed with rice and noodles.
Since the sweet potatoes themselves contain high amounts of starch, especially the sweet-hearted sweet potatoes, it is not advisable to cook by deep-fried or sweetened sugar so as not to give the body excessive energy. People with obesity and abnormal blood sugar need to avoid eating sweet desserts such as wire-pulled sweet potatoes. The sweet potato and the purple sweet potato are more like sand because of their taste, so they can be boiled with rice and boiled rice, or steamed and boiled with mud to add a flour to make a potato cake.