If you are willing to peel off my heart layer by layer, you will feel sour and you will shed tears. Why do onions make people cry? The following is a small make-up of your finishing, I hope it will help you. The cut onion will irritate our eyes and make us shed tears involuntarily. This is because when we cut onions, many onion cells will be destroyed, which contains enzymes. When the cells are cut off, the enzymes will run out, and then it will decompose the amino acid sulfoxide escaped from the split cells to form sulfoxide sulfoxide, which will rapidly recombine. The volatile gas and gas will arrive in our eyes to keep the eye moist and react with water. Therefore, we will shed eyes Tears.
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Why onions make people cry:
The cut onion will irritate our eyes and make us shed tears involuntarily. This is because when we cut onions, many onion cells will be destroyed, which contains enzymes. When the cells are cut off, the enzymes will run out, and then it will decompose the amino acid sulfoxide escaped from the split cells to form sulfoxide sulfoxide, which will rapidly recombine. The volatile gas and gas will arrive in our eyes to keep the eye moist and react with water. Therefore, we will shed eyes Tears.
Nutritional value of onion
1. Cancer prevention
The anti-cancer effect of onion comes from its rich selenium and quercetin. Selenium is an antioxidant, which can stimulate the immune response of human body, so as to inhibit the division and growth of cancer cells, and reduce the toxicity of carcinogens. Quercetin can inhibit the activity of cancer cells and prevent the growth of cancer cells. A survey shows that people who eat onions often are 25% less likely to develop gastric cancer than those who don't, and 30% less likely to die from stomach cancer.
2. Maintaining cardiovascular health
Onion is the only vegetable known to contain prostaglandin a. Prostaglandin A can dilate blood vessels and reduce blood viscosity, which can reduce blood pressure, increase coronary blood flow and prevent thrombosis. The content of quercetin in onion is rich, and its bioavailability is very high. Scientists report that quercetin may help prevent the oxidation of low-density lipoprotein (LDL) and provide important protection for atherosclerosis.
3. Stimulate appetite, help digestion
Onion contains allicin, has a strong aroma, processing because of the pungent smell and often make people cry. It is this special smell that can stimulate the secretion of gastric acid and increase appetite. Animal experiments have also proved that onion can improve gastrointestinal tension, promote gastrointestinal peristalsis, so as to play an appetizer role, atrophic gastritis, gastric motility, dyspepsia caused by anorexia has obvious effect.
4. Sterilization, anti cold
Onion contains plant fungicides such as allicin, which has strong bactericidal ability, can effectively resist influenza virus and prevent cold. When the phytobactericide is discharged through respiratory tract, urinary tract and sweat gland, it can stimulate the secretion of cell wall at these positions, so it has the functions of expectorant, diuretic, diaphoretic, antibacterial and antiseptic.
Tips: purple onion is more nutritious
According to the skin color, onion can be divided into white, yellow and purple skin three kinds. From the point of view of nutritional value, the nutrition of purple skin onion is better. This is because purple skinned onions are more spicy than the other two varieties, which means they contain more allicin. In addition, the purple part of purple onion contains more quercetin.
5. Onion has a good prevention of the disease
It is used for headache, nasal obstruction, body weight, aversion to cold, fever and no sweat caused by exogenous wind cold. Coca Cola 500ml, add 100g onion, 50g ginger, a small amount of brown sugar, simmer for 5min, while hot drink.
In recent years, it has been found that onion can effectively prevent 'Fugui disease'. Onion contains butyric acid, which can make cells better use of sugar and reduce blood sugar. Onion also contains prostaglandins, which can dilate blood vessels, reduce peripheral vascular resistance, promote the excretion of sodium, and reduce elevated blood pressure.
Onion contains a small amount of raffinose, which is a kind of functional oligosaccharide. It is an important sugar for onion to resist the harsh environment (cold and drought resistance). Raffinose can proliferate bifidobacteria in human body, which has the functions of moistening intestines and defecation, lowering blood fat and lowering blood pressure.
Onion also contains diallyl sulfide, which can prevent vascular sclerosis and reduce blood lipid. Quercetin can also be detected in onion. The glucosomes induced by xanthone have diuretic and detumescence effects, which are beneficial to the prevention of obesity, hyperlipidemia and arteriosclerosis, and are consistent with the function of drying dampness and detoxification of onion.
6. Other effects
(1) Prostaglandin A is a kind of strong vasodilator, which can antagonize the pressor substances such as catecholamine, promote the excretion of sodium salt and reduce blood pressure;
(2) The sulfide can promote fat metabolism, reduce blood lipid and anti atherosclerosis;
(3) Flavonoids in onion can reduce the viscosity of platelets. Eating onion often can prevent thrombosis and reduce the probability of myocardial infarction and cerebral thrombosis;
(4) Onion contains organic compounds similar to Metsulfuron, which can significantly reduce blood glucose;
(5) The sulfide and trace element selenium can inhibit gastric cancer, esophageal cancer, colon cancer, breast cancer, etc;
(6) The essential oil of onion can help sex, and eating onion often can improve the quality of sexual life;
(7) Onion can improve bone mineral density of experimental rats, and eating onion often can prevent osteoporosis;
(9) Onion is rich in vitamin C and nicotinic acid, which can promote the formation of intercellular substance and repair of damaged cells, make the skin smooth, ruddy and elastic, with cosmetic effect. Sulfur, vitamin E, etc., can prevent unsaturated fatty acids from producing lipofuscin pigment, can prevent senile plaque.
Note for onion:
Food is mutually exclusive
1. Onions and honey
Onion and honey can not be eaten together, eating together is not good for the eyes, will cause eye discomfort, serious will also lead to blindness.
2. Onions and kelp
Onion and kelp can not eat together, kelp contains rich iodine and calcium, onion contains oxalic acid, onion and kelp eat together easy to form stones.
3. Onions and fish
Onion and fish can not be eaten together, fish contains rich protein, onion and fish eat together, oxalic acid in onion will decompose, destroy the rich protein in fish, make it precipitate, not easy to be digested and absorbed by human body.
4. Onion and shrimp
Onion and shrimp can not be eaten together, shrimp calcium oxalate formation stone.
Unsuitable crowd
1. Patients with skin diseases should not eat onions.
2. People with eye diseases can't eat onions, and their condition will get worse.
3. Patients with gastrointestinal diseases can not eat onions, easy to lead to aggravation of the disease.