Is it harmful to your health to often smell other people's farts?

1. Slightly affected, harmless to the body. 2. Three ways of farting: (1) When swallowing food, air will enter the digestive tract; (2) Gas produced by food bacteria fermentation in the intestine; (3) The gas in the blood permeates into the intestine. 3. About 7~ 10 liter of gas enters the intestine every day, but most of it is absorbed by the blood vessels in the intestinal wall. About 0.5 liters of fart discharged from the intestine is the waste gas discharged from the body, mostly carbon dioxide, hydrogen and methane. 4. Uncomposed food parts, including fiber and sugar, become the food of Escherichia coli. Escherichia coli is discharged after a full meal, and these gases accumulate in the body, causing air pressure. Too much pressure will be pushed out of the body, forming a fart. 5. The main component of fart is nitrogen, accounting for about 23% ~ 80% of fart; Followed by carbon dioxide, accounting for about 20%; The third is hydrogen, methane and oxygen. The smell of fart comes from ammonia, hydrogen sulfide, indole, indigo matrix, odorous substances, volatile amines and volatile fatty acids produced by spoilage bacteria such as Escherichia coli when decomposing protein. Strictly speaking, fart is a dangerous gas, sometimes containing up to 47% hydrogen, and a little spark may cause an explosion. It has been reported abroad that in an intestinal operation, the short circuit of the electrotome produced an electric spark, which caused the fart overflowing in the intestine to explode and blew up a section of the intestine. Fortunately, the hydrogen in the fart is not always kept at the critical value of detonation, and the fart entering the air will be diluted quickly. 8. Farting by astronauts may cause sparks, and the consequences are unimaginable. To this end, in order to eliminate hidden dangers, NASA has also set up a special project and allocated funds to conduct a comprehensive, in-depth and systematic study on farting: what kind of food can make astronauts fart less during flight and prevent problems before they happen. 9. Fart is a bit obscene, but it is not small to learn.