What are the advantages and disadvantages of eating onions?

1, onion has the effect of dispelling cold, because the bulbs and leaves of onion contain an oily volatile called propylene sulfide, which has a spicy taste. This substance can resist cold and influenza viruses and has a strong bactericidal effect.

2. Onions are nutritious and spicy. It can stimulate the secretion of stomach, intestine and digestive gland, stimulate appetite and promote digestion. Onion contains no fat, and its essential oil contains a mixture of sulfur-containing compounds, which can reduce cholesterol and can be used to treat dyspepsia, anorexia and dyspepsia.

3. Onion is the only food known to contain prostaglandin A. Prostaglandin A can dilate blood vessels and reduce blood viscosity, so it can lower blood pressure, reduce peripheral blood vessels, increase coronary blood flow and prevent thrombosis. It can resist the action of pressor substances such as catecholamine in human body, promote the excretion of sodium salt, and thus lower blood pressure. Regular consumption has a health care effect on patients with hypertension, hyperlipidemia and cardiovascular and cerebrovascular diseases.

The disadvantages of eating onions:

1, eating onions is easy to cause eye paste and fever.

2. People with itchy skin, eye diseases, stomach diseases and lung and stomach inflammation should eat less onions.

Onions warm the heart, and patients with fever should be cautious.

Extended data:

Onion contains a substance called phlogiston 9, which is one of the most effective natural anticancer substances known at present. It can prevent the variation of biochemical mechanism in vivo and control the growth of cancer cells, thus having the function of preventing cancer. Selenium, a trace element contained in onion, is a strong antioxidant, which can scavenge free radicals in the body, enhance the vitality and metabolic ability of cells, and has the functions of preventing cancer and resisting aging.

Onions also contain a certain amount of calcium, which helps to prevent osteoporosis; Onion contains phytoncide, such as allicin, which has strong bactericidal ability. Onions contain allicin, which has a strong aroma. When processing, it often makes people cry because of its pungent smell. It is this special smell that can stimulate gastric acid secretion and increase appetite. Animal experiments also prove that onion can improve gastrointestinal tension and promote gastrointestinal peristalsis. It has obvious effect on anorexia caused by atrophic gastritis, insufficient gastric motility and dyspepsia.

Onion contains phytoncide, such as allicin, which has strong bactericidal ability and can effectively resist influenza virus and prevent colds. When this phytoncide is excreted from the body through respiratory tract, urinary tract and sweat gland, it can stimulate the secretion of cell wall in these parts, so it has expectorant, diuretic, sweating, bacteriostatic and antibacterial effects.

References:

Onions are good for people? Eating onions has four major effects-People's Daily Online.