Why does eating onions fart so smelly?

The culprit of smelly fart is indole and hydrogen sulfide. They are gases produced by the fermentation of protein, fats and other animal foods. These metabolites are not only malodorous, but also toxic. These gases can corrode the intestinal wall, leading to the decrease of intestinal barrier function and the increase of permeability, so that toxic substances in the intestine can enter the blood, thus endangering human health.

Onion is a pungent food, which contains a lot of gas substrates such as hydrogen, carbon dioxide and hydrogen sulfide. After eating it, it will often lead to a great increase in arrogance and a constant fart.

Extended data:

Although eating onions can easily lead to farting, onions are extremely rich in nutritional value.

1, and its sulfide can promote fat metabolism, and has the effects of reducing blood lipid and resisting arteriosclerosis. If you eat 50-70 grams of onion every day, its lipid-lowering effect is stronger than taking the antonym of lipid-lowering drugs;

2. Prostaglandin A is a strong vasodilator, which can antagonize pressor substances such as catecholamine, promote sodium excretion and lower blood pressure;

3. Onions contain organic substances similar to the hypoglycemic drug methanesulfonic acid, which can obviously reduce the blood sugar content;

4. Flavonoids contained in onion can reduce the viscosity of platelets. Eating onions regularly can prevent thrombosis and reduce the probability of myocardial infarction and cerebral thrombosis;

5, the volatile oil contained in onions can help, and the elderly often eat onions to improve the quality of sexual life;

6. Onion can improve the bone density of experimental mice, and eating onion often can prevent osteoporosis;

7. Onions are rich in vitamin C and nicotinic acid, which can promote the formation of interstitial cells, repair damaged cells, and make skin smooth, ruddy, elastic and have a cosmetic effect. Contains sulfur and vitamin E, which can prevent unsaturated fatty acids from producing lipofuscin pigment and prevent senile plaque. In addition, onions contain antibacterial and anti-inflammatory substances, and eating onions can prevent enteritis and dysentery.

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