The main components of onion are sulfur compounds, flavonoids, phenylpropanoids, steroidal saponins, nitrogen compounds, prostaglandins and trace elements such as calcium, iron and phosphorus. These components have different pharmacological effects, among which sulfur compounds have antibacterial and anticancer effects, nitrogen compounds have hypoglycemic and hypolipidemic effects, and flavonoids have antioxidant effects. These effects "look beautiful", but if we really want to achieve the effect of disease prevention, there is a premise that the effective ingredients must be absorbed by the human body and reach a certain dose. Therefore, putting onions in the living room can not prevent diseases except smelling them.

Onion (scientific name: onion), alias garlic, garlic, jade onion, onion, Dutch onion, leather tooth and so on. It is a biennial herb of Liliaceae and Allium. Onion contains prostaglandin A, which can reduce peripheral vascular resistance and blood viscosity, and can be used for lowering blood pressure, refreshing, relieving stress and preventing colds. In addition, onion can also scavenge oxygen free radicals in the body, enhance metabolism, resist aging and prevent osteoporosis. It is a health food suitable for middle-aged and elderly people.

Onions are widely distributed in China, and cultivated in both north and south. It is one of the main vegetables in China. Onion producing areas in China mainly include Fujian, Shandong, Gansu, Inner Mongolia and Xinjiang.

The function of onion:

Methods/steps

First, dispel cold and prevent colds.

Onions are spicy and slightly warm. It has the effect of dispelling cold.

Eating onions raw can prevent colds. Among onions, white-skinned onions are suitable for raw food.

Second, help digestion.

Onions are spicy and can stimulate the secretion of gastrointestinal digestive glands.

Thereby increasing appetite and helping digestion.

Third, lower blood pressure.

Onions have a good effect on lowering blood pressure and blood sugar.

It can also prevent thrombosis.

People with high blood pressure, hyperlipidemia and hyperglycemia eat onions, which is very good for their health.

Fourth, anti-cancer and anti-aging.

Onion contains trace element selenium, so it can enhance human metabolism.

So onions have anti-aging and anti-cancer effects.

Fifth, prevent osteoporosis.

Onions can increase bone density. Eating more onions helps to prevent osteoporosis.

Therefore, onion is a good health care product for the elderly.

Sixth, it can be sterilized.

Onion contains allicin and other fungicides, so onion has a strong sterilization and disinfection effect.