Onion is a frequent visitor to many family tables, which is rich in nutrition and has high therapeutic value. Known as the "vegetable queen" in European and American countries. Little known is that onions are also called "heart stents" in food.

Onion has a prominent protective effect on the heart: it is found that the organic sulfide in onion has antithrombotic effect, which helps to prevent unnecessary platelet aggregation, reduce cholesterol and triglyceride levels, and improve the function of erythrocyte membrane; Its rich flavonoids have a strong antioxidant effect, which is helpful to prevent cardiovascular and cerebrovascular diseases such as heart disease and cerebral hemorrhage.

Extended data:

Onions are divided by skin color, including purple skin, yellow skin and white skin. The data showed that the contents of protein, dietary fiber, calcium, magnesium, zinc and iron in purple-skinned onions were higher than those in light yellow-skinned and white-skinned onions, but the contents of carotene and vitamin C in the latter two were higher than those in purple-skinned onions.

It is worth mentioning that purple onion is rich in anthocyanins and has strong antioxidant function, which helps to protect the human body from free radical damage. In addition, the content of organic sulfide in purple onion is higher than the other two, so it is spicy. Generally speaking, the nutritional value of purple onion is higher than that of white onion and yellow onion.

Light-colored onions are relatively difficult to preserve because of their high moisture and sweetness, and are more suitable for cold salads and vegetable salads; Purple onion tastes crisper and has obvious spicy taste, which is suitable for quick frying in a short time. Onions should be selected with heavy weight, dry and dense skin and no scratches, and stored in a low temperature, dry, dark and well ventilated place. Need to be reminded that onions are more irritating to the stomach, and patients with gastric ulcer should eat as little as possible.

People's Network-Onion is a light skin heart support in food, which can be eaten raw and cold.