1, the principle of fart ^_^

Why is there gas in the digestive tract? This is because when people eat food, due to the role of normal flora in the digestive tract, they will produce more gas. These gases move downward with the peristalsis of the intestine and are discharged from the anus. When it is discharged, due to the action of anal sphincter, noise sometimes occurs. Therefore, farting is a manifestation of the normal operation of the intestine. On the contrary, if you don't fart, or fart too much and stink, that's an abnormal phenomenon.

2, sweet potato and fart

Sweet potato is a kind of high starch food, and it also contains a lot of mucus, which can keep the elasticity of human cardiovascular wall, prevent atherosclerosis and help keep the lubrication of respiratory tract, digestive tract and joint cavity. The cellulose and pectin contained in sweet potato can promote gastrointestinal health. Abdominal distension and farting after eating sweet potato are the results of sweet potato helping gastrointestinal peristalsis.

Decomposition of high starch food is easy to produce gas, and it is especially easy to fart after eating sweet potatoes.

If you think farting is indecent, you can reduce starchy foods and increase protein and vegetable foods at this time to achieve a balanced diet.

(hehe. . What a difficult question. . I hope it helps you. )