White PotatoWhite Potato (sweet potato) commonly known as groundnut. There are two kinds of red and white, flavorful and sweet, nutritious, containing a lot of sugar, protein, fat, vitamins and minerals. This product can be used as food, containing nutrients can increase body resistance, enhance the elasticity of blood vessel walls and bone and dental health, and contains a large number of carbohydrates, calcium and carotene, the latter two for the general rice, noodles are not as good as a high yield of nutritious grains, the product's medical value is being recognized, because of the more cellulose content in the intestinal absorption of a large amount of water, there is a laxative effect, can prevent the occurrence of colon cancer. Recent studies have pointed out that white potatoes contain anticancer substances trace elements selenium, and thus have a variety of anti-cancer effects. Eat white potatoes easy to bloating, spit acid, preventive approach is: steamed through, boiled can be broken Chao; most of the chlorinated enzymes, bloating acid will be reduced. In addition, with other grains to eat with good. Sweet potato (Ipomoea batatas (Linn.) Lam.) Cyclamenaceae annual plants. Sprawling herb, more than 2 meters long, lying flat on the ground diagonally. With underground caudex, caudex fusiform, tunic earthy yellow or purplish red. Leaves alternate, broadly ovate, 3-5-palmatifid. Cymes axillary, floral bracts small, subulate, sepals oblong, unequal, corolla campanulate, funnelform, white to purplish red. Capsule ovate or oblate, 1-4-seeded; caudex is starch material, edible, brewed or used as fodder. It is widely cultivated throughout the country. According to "Compendium of Materia Medica", "Compendium of Materia Medica Gleanings" and other ancient documents, sweet potato has the effect of "replenishing deficiency, benefiting vitality, strengthening the spleen and stomach, and strengthening the kidney and yin", which makes people "live longer and less ill". It can also tonify the middle, harmonize blood, warm the stomach, and fatten the five organs. Contemporary "Chinese Materia Medica" said it: "Sweet flavor, flat nature. Attributes to the spleen and kidney meridians." "Nourishes the middle and harmonizes the blood, benefits the qi and promotes the production of fluids, broadens the intestines and stomach, and relieves constipation. Mainly treats spleen deficiency and edema, sores and swollen poisons, intestinal dryness and constipation." Sweet potatoes are rich in starch, dietary fiber, carotene, vitamins A, B, C, E and potassium, iron, copper, selenium, calcium and more than 10 kinds of trace elements and linoleic acid, etc., with high nutritional value, and are known as the most nutritionally balanced health food by nutritionists. These substances can maintain the elasticity of blood vessels, very effective in the prevention and treatment of habitual constipation in old age. Unfortunately, most people think that eating sweet potatoes will make people fat and dare not eat. In fact, on the contrary, eating sweet potatoes not only will not get fat, on the contrary, can lose weight, health, prevent sub-health, laxative detoxification. Each 100 grams of fresh sweet potato contains only 0.2 grams of fat, producing 99 kilocalories of calories, probably for rice 1 / 3, is a very good low-fat, low-calorie food, but also can effectively prevent the sugar into fat, is conducive to weight loss, bodybuilding. Sweet potato contains a lot of dietary fiber, in the intestinal tract can not be digested and absorbed, can stimulate the intestinal tract, enhance peristalsis, laxative detoxification, especially for senile constipation has a better effect. Eat sweet potatoes should pay attention to must be steamed and boiled through. Eating sweet potatoes should not be excessive, Chinese medicine diagnosis of wet obstruction of the spleen and stomach, gas stagnation and food accumulation should be cautious of food. Japan's National Cancer Research Center recently announced 20 kinds of anti-cancer vegetables "list" for: sweet potatoes, asparagus, cauliflower, cabbage, broccoli, celery, bonobo, bell peppers, carrots, cauliflower, amaranth, capers, Brassica rapa, mustard greens, tomatoes, green onions, garlic, cucumber, Chinese cabbage, etc., of which sweet potatoes ranked first. Japanese doctors through the dietary survey of 260,000 people found that cooked sweet potatoes cancer inhibition rate (98.7%) is slightly higher than raw sweet potatoes (94.4%). The Philadelphia Hospital in the United States also extracted an active substance from sweet potatoes --- deandrosterone, which can effectively inhibit the occurrence of colon cancer and breast cancer. Sweet potato leaves, i.e. the young leaves at the top of the aboveground seedling stems after the sweet potato matures in the fall. Tests show that every hundred grams of fresh sweet potato leaves contain 2.28 grams of protein, 0.2 grams of fat, 4.1 grams of sugar, 16 milligrams of the mineral potassium, 2.3 milligrams of iron, 34 milligrams of phosphorus, 6.42 milligrams of carotene, vitamin C0.32 milligrams. Comparing it with common vegetables, the content of minerals and vitamins is superior, and the carotene content is even higher than that of carrots. Therefore, the Asian Vegetable Research Center has listed sweet potato leaves as highly nutritious vegetable varieties, calling it "vegetable queen". Research has found that sweet potato leaves have health functions such as improving immunity, stopping bleeding, lowering sugar, detoxifying, and preventing night blindness. Regular consumption of constipation prevention, vision protection, but also to maintain delicate skin, delay aging. In recent years in Europe and the United States, Japan, Hong Kong and other places set off a wave of "sweet potato leaf fever". Food made with sweet potato leaves, and even put on the hotel, restaurant tables. In our country, the city supermarkets can not see the sweet potato leaves for sale, farmers harvested sweet potatoes will be sweet potato leaves, together with the stems thrown in the ground, or used as feed for livestock, which is a great pity. There are many ways to eat sweet potato leaves, which are slightly introduced here. Select the tender tips of the leaves, boiling water after boiling, with sesame oil, soy sauce, vinegar, chili oil, mustard, ginger and other seasonings, made of coleslaw, its appearance of tender green, can be appetizing. Can also be sweet potato leaves with shredded meat and stir-fried together, eat the sweet and fragrant, distinctive flavor. In addition, sweet potato leaves can be used in soups or porridge. Japanese market has canned pickled sweet potato leaves small vegetables for sale, we can also add salt to make it into pickles, small dishes, for consumption. The shortcomings of sweet potatoes, is the lack of protein and lipids, but today people live in affluence, has no longer sweet potatoes as a staple food, it lacks the nutrients can be supplemented by other meals. For example, the milk and sweet potatoes at the same time, because milk is rich in protein and fat components