Onion makes people love to hate it, it is a must-eat dish for many long-lived elderly people, it can soften blood vessels and lower blood viscosity, however, housewives don’t like it because it will drop tears when handled, and that spicy taste is not acceptable to everyone. In fact, in addition to these onions have more secrets that you do not know. Onion these effects you may not know: 1, calcium and bone. The onion is rich in calcium, and can be comparable to small greens, cabbage and other calcium-rich vegetables, and also contains magnesium and potassium, calcium and phosphorus ratio is also appropriate, calcium good absorption. 2.Improve the intestinal environment. Onions and burdock, asparagus and other vegetables, like oligosaccharides, not digested by the stomach and small intestine, but in the large intestine decomposition as bifidobacteria and other beneficial bacteria food. 3, promote weight loss and cure constipation. Onion is rich in dietary fiber, increase satiety and promote bowel movements, in addition, onions produce bifidobacteria factor is also conducive to intestinal flux. 4, to relieve greasy. Do some high-fat meat dishes, such as steak, roast pork, baked fish, etc. with onions can not only remove the fishy taste, but also solve the greasy, reduce the body’s absorption of fat. 5, sterilization. Onions contain volatile propylene sulfide, which has a bactericidal and antibacterial effect, and has a dispersal effect on pests, so onions are zero pesticide residue vegetables. 6, cancer prevention. Onions are rich in quercetin and selenium. The former inhibits cancer cell activity and stops the growth of cancer cells, while the latter is a strong antioxidant that reduces oxidative damage in the body. 7, to prevent colds. Onion is slightly spicy and slightly warm, with the effect of dispersing wind and cold, can prevent colds, but also relieve the symptoms of cold-induced nasal congestion and runny nose. 8, to reduce the body’s inflammatory response. The prostaglandin A contained in the onion is a strong vasodilator, which is helpful in reducing the body’s inflammatory response, regulating blood pressure and reducing blood viscosity. Notes on eating onions: 1. In spring and summer, we can buy fresh onions. The outermost layer of this onion has a thinner skin, while the flesh is thicker and has more moisture, as well as being less spicy. While most of the onions in colder times are stored, they are more spicy, with thicker skin and less moisture. 2. To store in a dark place. When buying onions, buy the kind that are heavy in your hands, have dry, firm skin, no scrapes, and don’t smell (because onions release odors when they are scraped or scratched). Buy onions and keep them in a cool, dry, dark and well-ventilated place. Never put onions in a plastic bag so that the onions that would otherwise be hard to put away will soon rot. 3. Common onions are divided into two types: purple-skinned and white-skinned. White skinned onions are tender, high in moisture and sweetness, and have a golden color and rich sweetness after long cooking, making them suitable for fresh eating, baking or stewing; purple skinned onions are slightly red and spicy, making them suitable for frying or making lettuce salads. Purple skin onions are a bit more nutritious. 4, fried a little charred, the flavor is more intense. Onions can bring a slightly sweet-based rich taste and a nice caramelized color to dishes. To achieve this effect, slow heating is an important secret. To do this, pour a little oil into a pan, add the chopped onions and heat them over low heat to slowly and fully release the sugar. Stirring occasionally can avoid sticking to the pan, and covering the pan can maintain the temperature and humidity. 5.Raw onions bring out the coolness. Raw onions taste a bit punchy, but it is these flavorful substances that have excellent health functions such as anti-cancer. If you want to get more health from onions, eating them raw or tossed in a salad is the best way to go. When eating heavily flavored and oily foods such as beef and lamb, pairing raw onions with them can have a demulcent effect and bring out a fresh, minty feeling.