Eating too many onions is harmful to health?

Onions are very nutritious, but eating too much is not good. The nutritional function of onion is very common in daily life. There is a folk saying that "onions are not ripe". Almost every family has a bundle of onions, which are prepared to be used as seasoning or as seasoning vegetables. No one regards onions as noble nutrients; But if we say its nutritional value and health care value, we can't underestimate it. Onions can be eaten all year round, with various varieties and different nutritional values. The contents of carotene and vitamin C in fresh onion leaves are quite high, and it is understandable that the nutrients in onion leaves are higher than those in discarded onion leaves. Onion is rich in vitamin C and carotene, and it is a nutritious vegetable. When we eat onions, don't just pay attention to the tender onion and throw away the leaves casually. The health value of onion is more prominent than the content of nutrients. According to Chinese medicine, onions can relieve exterior syndrome by sweating. People often use onions to cook soup with ginger and brown sugar to treat the first cold. Onions have the functions of strengthening stomach, stimulating appetite and strengthening physique. Eating more raw onions can also warm the body, improve the body's resistance and prevent respiratory infectious diseases. It turns out that onion contains volatile oil, among which allicin is an expert in sterilization, which can kill bacteria in oral cavity and respiratory tract. Onions, like garlic, can prevent the increase of cholesterol in blood and arteriosclerosis, lower blood pressure, protect blood vessels and reduce the occurrence of thrombosis. Therefore, onions are especially beneficial to mental workers who have less physical activity, excessive mental fatigue and are prone to cardiovascular diseases. "slimming" onions are a must-have in the kitchen. It is said that Shennong tasted a hundred herbs and found onions. Onion, as a condiment in daily diet, was added to reconcile various dishes, so it was called "Hehe Grass" in ancient times. Now, there is also a saying among the people that "there is no cooking without onions". Onions are hot and fragrant. Onions are spicy and light, and can be used to make all kinds of dishes. Nutritional efficacy: Onions contain volatile oil and have a pungent smell. When used in cooking, it can remove the fishy smell in greasy dishes, produce special aroma, stimulate the secretion of digestive juice and stimulate appetite. Onion itself is also rich in vitamins and minerals, which has a certain nutritional and health care function. The volatile capsaicin it contains has strong bactericidal ability, when capsaicin passes through sweat glands and respiratory tract. When the urinary system is discharged, it can slightly stimulate the secretion of related glands and play a role in sweating and eliminating phlegm. The role of diuresis, thereby improving the body's resistance and preventing respiratory infectious diseases. In addition, onion can promote blood circulation, improve the function of nervous system, and play a certain role in preventing cardiovascular diseases and Alzheimer's disease. Eat well: about 20 grams each time. Don't eat too much, otherwise it will cause dizziness. Onions are suitable for mental workers. Exterior deficiency, sweating and body odor. Patients with gastrointestinal diseases and eye diseases should not eat. Onions should not be eaten with honey. After eating onions, people will leave an unpleasant smell of onions in their mouths. At this time, just rinse your mouth with strong tea or chew a few pieces of tea in your mouth to get rid of this taste. Selected treasures: good quality onions should be white and long, strong and uniform, with green leaves, no pests and no dead leaves. Onions should be tied up with their roots down and stored in a cool and ventilated place for a short time. Onions have strong cold resistance and are not afraid of freezing. The family and genus are scaly stems of Allium in Liliaceae. Alias Polygonum hydropiper, Deer Fetus, Laibo, Four Seasons Onion, Heshi Grass, Allium fistulosum and Onion are warm and taste Xin Ping; Enter the lung and stomach meridians. Indications: sweating to relieve exterior syndrome, dispelling cold and activating yang, detoxifying and dispersing coagulation. Indications: slight cold due to wind-cold, carbuncle, swelling and sore, dysentery, weak pulse, abdominal pain due to cold coagulation, and dysuria. Every 100g nutrient contains 90g of water, 2.5g of protein, 0.3g of fat, 5.4g of carbohydrates, 54mg of calcium, 6 1mg of phosphorus, 2.2mg of iron, 0.46mg of carotene and 0/5mg of vitamins. In addition, it also contains protopectin, water-soluble pectin, thiamine, riboflavin, nicotinic acid, allicin and other ingredients. Therapeutic effect 1. Effective ingredients such as onion volatile oil, which can clear away heat and resolve phlegm, can stimulate the sweat glands of the body and achieve the effect of sweating and heat dissipation; Scallion oil stimulates the upper respiratory tract and is easy to expectorate. 2. Promote the digestion and absorption of onion, and also stimulate the secretion of digestive juice in the body, which can strengthen the spleen and stimulate appetite. 3. Allicin containing antibacterial and antiviral effects in onion has obvious antibacterial and antiviral effects, especially on Shigella dysenteriae and dermatophytes. 4. The pectin contained in anti-cancer shallots can obviously reduce the occurrence of colorectal cancer and has anti-cancer effect. Allicin in onion can also inhibit the growth of cancer cells. Health recipes 1. Onion drum soup 30g, fermented soybean 10g, 3 slices of ginger and 30ml of yellow wine. Add 500 ml of onion, fermented soybean and ginger to water and fry until cooked, and then boil rice wine once or twice. This soup has the effect of dispelling cold, regulating qi and regulating middle warmer, and is suitable for exogenous wind-cold, aversion to cold, fever, headache, stuffy nose and cough. 2. Onion jujube soup 20 jujubes and 7 onions. Wash the red dates, soak them in clear water, put them in a pot, add some water and boil them with slow fire. After about 20 minutes, add the washed scallion and continue to fry with slow fire 10 minutes. When taking, eat dates and drink soup twice a day. The soup has the effects of invigorating spleen, regulating stomach, dispelling cold and activating yang, and can be used for adjuvant treatment of heart-qi weakness, chest distress, insomnia, dreaminess, amnesia and other diseases. 3. Stew 50 grams of trotters with onion, 4 trotters, and appropriate amount of salt. Plucking pig's trotters, cleaning, and cutting with a knife; Cut the onion into sections, put it with the pig's trotters, add a little salt, boil it with strong fire first, and then stew it with slow fire until it is cooked. This dish has the effects of enriching blood, reducing swelling and promoting lactation. Is suitable for asthenia due to blood deficiency, limb pain, edema, swelling and pain, and postpartum hypogalactia. 4. Scallion-roasted sea cucumber 120g onion, 200g water-soaked sea cucumber, 250ml clear soup, 2 Chinese cabbage, proper amount of cooking wine and wet corn flour. Wash the sea cucumber first and blanch it with boiling water; Parching onion segments with cooked lard to obtain onion oil; Add clear soup, soy sauce, monosodium glutamate, salt, cooking wine and other seasonings to sea cucumber, pour wet corn flour on sea cucumber and cabbage, and pour scallion oil. This dish has the effects of nourishing lung and kidney, benefiting essence and strengthening yang. It is suitable for dry cough and hemoptysis caused by lung yang deficiency, impotence and nocturnal emission, aplastic anemia and diabetes caused by kidney yang deficiency. 5. Onion porridge Onion 10g, 50g of japonica rice, and appropriate amount of sugar. Cook the japonica rice first, and then put the chopped green onion and sugar in it when the rice is cooked. The porridge has the effects of relieving exterior syndrome, dispelling cold, regulating stomach and invigorating middle energizer. It is suitable for common cold, headache, stuffy nose, body heat without sweat, swollen face, dyspepsia, carbuncle and other symptoms. 6. There are 20 onions and 20 dates in the soup of green onions and red dates. Wash onion and cut into sections, wash jujube and cut into half; Boil them in water, and add appropriate amount of sugar before cooking. This soup has the effect of regulating stomach and calming nerves, and can be used for the adjuvant treatment of insomnia, physical weakness, anorexia and dyspepsia caused by neurasthenia. Precautions should not be taken orally with honey; It is not suitable for people who are overworked and sweaty. People who often eat onions are prone to produce a special volatile oil, which contains allicin, which has a strong bactericidal effect and has obvious effects on preventing respiratory infectious diseases and spring colds. Eating onions often in spring can promote the secretion of digestive juice, help eliminate the dirt and turbid gas accumulated in the gastrointestinal tract, increase appetite, strengthen the spleen, lower blood pressure, blood lipid and blood sugar, and enhance human immunity. These effects are related to the rich trace elements such as germanium in onions. In addition, eating onions is also good for cardiovascular sclerosis, elevated cholesterol, constipation and obesity.