1, onions have the effect of antipyretic, which is determined by the nutritional value of onions. Onions contain an oily volatile substance, so when we eat onions, we always feel a pungent flavor, and this substance can play the role of sterilization, which can prevent the flu virus.

2, the unique flavor of onions can increase the human appetite, in the summer, because of the weather, many people will have a loss of appetite, this time you can eat a little bit of onions, to regulate the spleen and stomach.

3, in the onion contains trace elements of selenium, the nutritional value of the onion determines that it has an anti-aging effect. Selenium is a very strong antioxidant, so often eat some onions, can play a beauty effect.

4, in the onion contains a kind of nutrition called "oak skin yellow pigment", it is a kind of natural anti-cancer substances, so, often eat onions, can also play the effect of anti-cancer.

Expanded information:

Types of onions

1, white skin species: bulbs, white or slightly with the appearance of the Green, tender flesh, juicy spicy leaves light, good quality, suitable for raw food.

2, yellow skin species: bulb medium size, thin scales, yellow skin, palladium white with yellow meat, tender and soft meat, less water, sweet and slightly spicy flavor, excellent quality.

3, red-skinned species: bulbs, large, purplish-red or dark pink skin, meat white with red, dense tissue, brittle texture, meat is not as tender as yellow-skinned species, more water, spicy taste is heavier, the quality is poorer, but resistant to storage.

People's Daily Online - The efficacy and role of onions and types