Onions can be eaten raw.

Raw onions prevent heart disease. Harvard Medical School cardiology professor Dr. Keto Gelwich pointed out that onions contain a lot of heart-protecting flavonoids, eat half a raw onion every day, or drink an equal amount of onion juice, can increase heart disease about 30% of the "good cholesterol".

Particularly when you're eating unhealthy foods like barbecue, the onion in it is like a "life saver" for you.

Sun Mengli, director of the Department of Nutrition at Peking University First Hospital, pointed out that onions are really good for people with high blood pressure, high blood cholesterol and cardiovascular patients, and they are best eaten raw and cold.

Expanded

1, onion is currently known as the only food containing prostaglandin A. Prostaglandin A has the role of vasodilatation, reduce blood viscosity, reduce peripheral and coronary artery blood flow, and prevent thrombosis. At the same time, it can also fight against catecholamines and other pressure-raising substances in the body, promote the excretion of sodium, so that blood pressure falls, is a good choice for hypertension, hyperlipidemia and cardiovascular and cerebrovascular patients.

2, onions contain a substance called "oak bark flavin", which is currently known as one of the most effective natural anticancer substances, which can prevent the body's biochemical mechanism of variation, inhibit the growth of cancer cells, with cancer prevention and anti-cancer effects.

3, onions also contain some calcium, in recent years, Swiss scientists found that eating onions can improve bone density, help the body to prevent osteoporosis.

4, onions have a certain role in refreshing, it can help human cells to better utilize glucose, while lowering blood sugar, supplying brain cells with heat, is diabetes, mental depression patients with a good dietary therapy vegetables.

5, onion has the role of dispersal of wind and cold, because the onion bulb and leaves contain a kind of greasy volatiles known as propylene sulfide, although with a spicy flavor, but this substance can resist cold, against influenza viruses, which contains phytobacterial elements such as allicin and other strong bactericidal effect, for mouth ulcers also have a certain benefit.

6, onions contain trace elements selenium is a strong antioxidant, can eliminate free radicals in the body, enhance cellular vitality and metabolism, has the effect of anti-aging, is the beauty of women's beauty products.

7, onion odor spicy, can stimulate the stomach, intestines and digestive glands to secrete digestive juices, enhance appetite, promote digestion, and onion does not contain fat, its essential oil contains a mixture of sulfur compounds that can reduce cholesterol, can be used to improve indigestion, loss of appetite, food accumulation within the stop and so on, especially suitable for some obese people to eat.

Note: Patients with skin diseases, patients with eye diseases and patients suffering from gastrointestinal diseases can not eat onions, otherwise, it is likely to lead to aggravation of the condition. In addition, onions and honey, onions and kelp, onions and fish, onions and shrimp are incompatible and can not be consumed together.

Reference People's Daily - cold water tea, raw onions ten dietary habits to determine the length of life