Can Onions Kill Cancer Cells; Can Eating Onions Prevent Cancer?

       Onions are very familiar food. Onions have a unique smell, which makes them "delicious" and attractive to taste buds.

　　Onion is a kind of healthy food. Proper consumption of onion is of high health value to human body and can help meet nutritional needs.

　　At the same time, there are many controversies about onion anti-cancer. Researchers found that onions can kill cancer cells, but whether eating onions can achieve the same effect remains to be discussed.

　　The researchers published an article in the Journal of International Food Research, saying that they exposed colon cancer cells to quercetin, which is extracted from five kinds of onions and is a "sharp blade" to kill cancer cells - they can open the "suicide channel" of cancer cells, destroy their living environment and block the communication between cancer cells.

　　Among them, red onion has the best anti-cancer effect.

　　Does this mean that eating more onions will prevent cancer?

　　The senior scientific information officer of the Cancer Institute said that we cannot easily draw this conclusion.

　　After all, the human body is an extremely complex organization.

　　If scientists can find out which molecules in onions have this effect, they may help to develop new anti-cancer drugs.

　　Five tips are to teach you to cut onions without tears

　　1. Freeze onions for 15 minutes and then chop them.

　　Freezing will not destroy the taste of onions, and will reduce the production of irritants.

　　2. Cut onions in a well ventilated place, for example, move the electric fan to blow directly, or turn on the range hood to minimize the irritating gas of onions.

　　You can also cut onions in an enclosed container.

　　3. Heat onions in the oven before cutting onions to destroy alliinase.

　　4. Wear contact lenses to prevent contact between cornea and SPSO acid.

　　Some people will wear goggles, but it will affect their vision.

　　Be careful when cutting onions.

　　5. Before cutting onions, light a candle, so that the volatile substances will be absorbed into the flame rather than irritate the eyes and nasal mucosa.

　　Onion peel can help you control oil temperature

　　High temperature cooking is a normal way for Chinese people to cook.

　　Under high temperature, fat soluble vitamins and essential fatty acids contained in oil will also be destroyed, thus reducing the nutritional value of oil.

　　If you want to enjoy delicious food and keep the nutrition of food intact, how to control the temperature of oil?

　　The associate professor of the Department of Nutrition and Food Safety, School of Food, China Agricultural University introduced a "onion skin detection method": put the onion skin in the oil pan, and when the onion skin is exposed to hot oil, the onion skin will emit oil bubbles.

　　Oil temperature can be judged by oil bubble.

　　If there are few oil bubbles around the scallion skin, the oil temperature is not enough; If the scallion skin turns yellow quickly, the oil temperature may be too high; It is better to see that the color of scallion skin remains unchanged and there are small oil bubbles on the side. This is the correct temperature.

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