However, after the onion germinates, the nutrients in the scales will be transferred to the top for bud growth, resulting in the decline of nutrients. In addition, the germination of onion will affect its commodity value, and its taste is also spicy. Therefore, onions should be placed in the sun for a period of time, and then placed in a ventilated and dry place to avoid germination.
The benefits of eating onions
1. Onions have the function of expelling wind and dispelling cold because the bulbs and leaves of onions contain an oily volatile called propylene sulfide.
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 compounds, which can lower cholesterol.
Onion is the only one that contains prostaglandin A at present. 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.
4. Onion 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 diet vegetable for patients with diabetes and listlessness.
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.
6. 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.
7. Onions also contain a certain amount of calcium. In recent years, Swiss scientists have found that eating onions regularly can improve bone density and help prevent osteoporosis.
Onions are warm and sweet. Has expectorant, diuretic, stomach invigorating, intestine moistening, detoxicating, and insecticidal effects. Onion extract also has bactericidal effect, and can improve gastrointestinal tension and increase digestive tract secretion. However, eating onions needs to pay attention to the following matters:
Eat onion food
1. Onions and honey
Onions and honey can't be eaten together. Eating together is not good for eyes, it will cause eye discomfort and even lead to blindness.
2. Onions and kelp
Onion and kelp can't be eaten together, kelp is rich in iodine and calcium, onion contains oxalic acid, and eating onion and kelp together is easy to form stones.
3. Onions and fish
Onions and fish can't be eaten together. Fish is rich in protein. Onions and fish can be eaten together Oxalic acid in onion will decompose and destroy the rich protein in fish, making it precipitate, which is not easy to be digested and absorbed by human body.
4. Onions and shrimps
Onions and shrimps can't be eaten together, and shrimps form calcium oxalate and produce stones.
Not suitable for people who eat onions.
1. Patients with skin diseases should not eat onions.
People with eye diseases can't eat onions, and their condition will get worse.
3. Patients with gastrointestinal diseases can't eat onions, which can easily lead to aggravation of the disease.