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Onions are known as a panacea and have been dubbed the "Queen of Vegetables." They are used to treat a wide range of ailments, from diabetes and female infertility to respiratory and gastrointestinal diseases. The key factor lies in the high content of thiosulfinates and other compounds found in onions.quercetin(quercetin).
Thiosulfites have been shown to reduce diabetes symptoms and protect against cardiovascular disease. Quercetin has antioxidant, anti-allergic, anti-inflammatory, and protective properties against stomach ulcers, colon cancer, esophageal cancer, and even breast cancer. A report from the Federation of European Biochemical Societies further indicates that the human body absorbs quercetin from onions more than three times faster than from apples or tea.

Preventing osteoporosis
A research report published in the journal *Nature* indicates that onions are the most effective vegetable for preventing bone loss, even more so than calcitonin, a drug used to treat osteoporosis. Experiments on mice showed that consuming 1.5 grams of onions daily reduced the rate of bone loss by 25%, with results visible within just 12 hours.
However, if researchers want to use onions to prevent osteoporosis, they believe that one might need to eat 200 to 300 grams of onions every day, which is about 1 to 2 onions.

Preventing high cholesterol
Dr. Victor Gurewich, a professor of cardiology at Harvard Medical School, points out that eating half a raw onion daily, or drinking an equivalent amount of onion juice, can increase the level of high-density lipoprotein cholesterol (HDL) in heart patients by an average of about 30%. However, based on his own experiments, Dr. Gurewich believes that onions should not be overcooked to be effective.

Fighting asthma
Onions contain at least 3 typesAnti-inflammatory natural chemicalsOnions can treat asthma. According to German research, onions can reduce the chance of asthma attacks by about half.

Helps with fat metabolism
The experiments in Gullwich also found that onions can prevent platelets from clumping together and accelerate the dissolution of blood clots. Therefore, when you enjoy high-fat foods such as steak, it's best to pair them with some onions, which will help counteract the blood clots caused by high-fat foods.
Traditional Chinese medicine also has related views. Onions are pungent and warm, and they affect the lung, spleen, stomach, and liver meridians. Chen Weida, director of the Traditional Chinese Medicine Department at Lixin Hospital, mentioned that onions are particularly effective for liver metabolism and help lower blood lipids.

This is the safest choice!
1. The heavier the weight, the better, as it indicates that it is more hydrated.
2. Choose purple or yellow onions. Michael Havey, a geneticist at the U.S. Department of Agriculture and a professor of horticulture at the University of Wisconsin, explains that the brighter the color, the more thiosulfates it contains. "And heat will cause the thiosulfates to be lost, so it's best to eat onions raw or cook them quickly."

How to cut onions without crying
The reason you tear up when cutting onions is that when you break down onion cells, it releases an enzyme that produces propanethial sulfoxide gas. When this gas comes into contact with tears, it produces sulfuric acid, and the brain then tells the lacrimal glands to secrete tears to wash away the sulfuric acid.
Irwin Goldman, a professor of horticulture at the University of Wisconsin-Madison, says that this enzyme is mainly concentrated in the roots of onions, so there are many ways to reduce tearing:
1. The later you cut the onion root, the more effectively you will delay the stimulation of the tear glands.
2. Freezing onions in the refrigerator for a while before cutting them can minimize their irritating effects.
3. Japanese research has found that cutting onions in half and then microwaving them for 2-3 minutes can reduce tearing and also help peel them quickly. However, this method is not suitable for making salads.
4. Soak the onion in cold water before chopping.

How to remove the pungent smell of onions?
1. Soak the sliced onions in ice water until they become translucent.
2. Rinse the sliced onions under running water for 10-20 minutes.