Onion does have many nutritional functions. It is rich in biotin, carotene, vitamin C, quercetin, prostaglandin A and selenium, which makes it have a good health care effect. Onion, a heated food in life, has its own special taste and crisp taste.
For onions, there are many kinds of stories in the market, especially the theory that onions soften blood vessels and treat heart disease. In fact, some of what you have heard is not necessarily true. You may not know the vegetable onion. About onions, you need to know these things. Eating onions is ok and has many benefits, but you can't deify them.
There are quite different nutrients in all kinds of onions, but the contents are considerable. Onion has hypoglycemic effect. It contains substances similar to sulfonylurea hypoglycemic agents < P > protein, dietary fiber, minerals such as potassium, magnesium, calcium, iron and zinc, which are all present in onion, especially in purple onion. Among white-skinned onions and yellow-skinned onions, the contents of nutrients such as carotene and vitamin C are also good.
Onion has hypoglycemic effect. It contains substances similar to sulfonylureas, which can act on islet β-cells and promote the synthesis and secretion of insulin. In addition, the sulfonylurea butyric acid contained in onion can increase the body's consumption of blood sugar, thus achieving the purpose of lowering blood sugar; These ingredients are easily decomposed by high temperature, so it is best to choose raw onions!
Onion is the only plant containing prostaglandin A, which can effectively dilate blood vessels, reduce peripheral vascular resistance, increase coronary blood flow and promote myocardial blood supply, and has good benefits for patients with hypertension and coronary heart disease. Eating onions for a long time will be good for your health.
Scientific research also shows that onions have certain effects in preventing cancer, maintaining cardiovascular health, resisting oxidation and resisting aging. Therefore, eating onions for a long time will be good for your health. Although the benefits of onions are there, it is not necessary to eat them every day. It is still necessary to pay attention to the rain and dew, and the nutrition is balanced.
If you like eating very much and you have to eat it every day, you can use onions as a side dish. Onion mixed with fungus, scrambled eggs with onion, fried tomatoes with onion, fried meat with onion, etc., are all delicious foods. ? Onion is the only known vegetable containing prostaglandin A. < P > Onion is the only known vegetable containing prostaglandin A. Prostaglandin A can dilate blood vessels and reduce blood viscosity, so it can lower blood pressure, increase coronary blood flow and protect cardiovascular system. The cardiovascular benefits of eating onions regularly are obvious.
Although onion is good, it should be clear that it is food after all. Although it has certain health care function, it cannot be eaten as medicine. It can't replace drugs and play a therapeutic role. Eating more onions can only get richer and more balanced nutrition and reduce the occurrence of various diseases, including cancer.
Onion contains many active substances, such as flavonoids, polyphenols, quercetin, etc., and purple onion also contains a certain amount of anthocyanins, which have the effects of resisting free radicals, delaying aging and enhancing disease resistance; Onion is the only vegetable containing "prostaglandin A" in all vegetables, and it has been used in many animal experiments.
It can dilate blood vessels and reduce blood viscosity, so it has the potential effect of lowering blood pressure and preventing cardiovascular and cerebrovascular diseases, but this does not mean that it can lower blood pressure. After all, it is not a clinical experiment and there is no dose certainty. These volatile sulfur-containing compounds in onions can also prevent atherosclerosis < P > Some experiments also found that these volatile sulfur-containing compounds in onions can also prevent atherosclerosis and reduce the deposition of impurities on blood vessel walls, so onions have potential benefits for patients with high blood pressure and high blood pressure, and it is no problem to eat some properly.
Volatile gases in onions are easily volatilized by heating, so it is best not to heat onions for a long time if these sulfur-containing compounds are to work. When buying onions, the better the sense of skin music, indicating that the wrapping degree is good and the invagination is well preserved. You can pinch the onions, and the hardness is good, indicating that the invagination has no holes.
Generally speaking, purple onion is more nutritious, but it has higher sulfur compounds and higher spiciness. White onion has more tender juice and tastes sweeter. You can choose according to your preference.