Onion, also known as onion, garlic, jade onion, green onion and so on. It is a perennial herb of Allium in Liliaceae. It is a common cheap home-cooked dish. It originated in Southwest Asia and was widely planted in China in the early 20th century. The edible part of onion is a fleshy bulb, which looks like a sphere, white and purple. After peeling, it will give off a strong spicy taste and have high nutritional value. Known as the "vegetable queen" in Europe and America. Why is onion called the vegetable queen?

1, supplement various nutrients. Whether it is vitamin C, dietary fiber, or a variety of mineral elements, they are all "nutrients worth mentioning" in onions, which have a good supplementary effect.

2. Promote intestinal metabolism and prevent constipation. In life, many people are troubled by constipation because they eat too much fish and meat, drink too little water and have an unhealthy lifestyle. Regular intake of fresh vegetables such as onions can increase the intake of dietary fiber, promote intestinal metabolism, enhance defecation desire, and prevent intestinal problems such as constipation.

3. Vitamin E in onion is an ideal antioxidant, which can prevent senile plaque. It contains a lot of nutrients such as sulfur and vitamins, which can eliminate waste in the body, slow down the oxidative aging of internal organs and play a role in delaying life.

4. Onion also has a certain refreshing effect, which can help cells make better use of glucose, lower blood sugar and provide heat energy for brain cells. It is a good choice for diabetic patients.

5, the role of proper sleep regulation. Speaking of onion, it contains a certain amount of folic acid, which can inhibit the production of too much homocysteine in the body, thus inhibiting the production of interference hormones. Therefore, eating onions properly has a good effect on sleep and emotional regulation.

6, stimulate appetite and help digestion. Onions contain allicin and have a strong fragrance. It often makes people cry because of its pungent smell during processing. It is this special smell that can stimulate gastric acid secretion and increase appetite. Animal experiments have also proved that onion can increase the tension of gastrointestinal tract, promote gastrointestinal peristalsis, thereby increasing appetite, and has obvious curative effect on anorexia caused by atrophic gastritis, insufficient gastric motility and dyspepsia.