Q: I feel like I’m a straight person, especially at lunch and dinner, and I want to go to the bathroom right after eating. Is this normal? How can I improve it? 1. Gastro-colonic reflex We know that in the digestive tract, after the food is digested and absorbed, the residual part forms feces. After the formation of feces, the colon peristalsis causes the regular contraction of each colon, which pushes the feces to the distal colon and stores it in the sigmoid colon. After eating or after waking up in the morning, due to the presence of the gastric-colonic reflex or (lying) postural reflex, the total peristaltic frequency of the colon is accelerated several times compared to lying down or fasting, at this time, if there is feces in the sigmoid colon, the feces can be pushed into the rectum, when the rectum accumulates a sufficient amount of feces, there will be a certain pressure on the intestinal wall, which causes a defecation reflex, even if the intention. A normal adult who eats about 1,000 calories of food can cause increased electrical activity and movement of the colon. In patients with diarrheal irritable bowel syndrome (possibly gluten intolerant), this response is more pronounced after a meal, i.e., the gastrocolic reflex is hyperactive, colonic group peristalsis increases, and basal rhythmic contractions decrease, causing defecation and even abdominal discomfort. The gastro-colonic reflex is regulated by nerves and hormones, and is related to the content of fat and protein components of food as well as its state. (1) Food composition ① Carbohydrates and fats can cause an increase in colonic motility; ② Especially the fat content of food is the main stimulus to increase colonic motility; ③ Contrary to the effect of carbohydrates and fats, the protein and amino acid components of food can inhibit the increase in colonic motility. (2) Food status ① Solid food increases the power index of descending colon and rectosigmoid; ② Conversely, food in liquid homogenized form reduces the colonic power response; ③ Starch fermentation in the intestine stimulates the production of colonic propulsive activity. 3. conclusion The rapid onset of bowel movements after meals is probably due to hyperactive gastrocolic reflexes, but if there is no significant abdominal pain or diarrhea, there is no need to worry, as there are always individual differences and it is normal. 4. 4. Suggestions for improvement ① Smaller and more frequent meals: consuming about 1000 calories of food will cause gastrocolonic reflexes to occur, so it is appropriate to reduce the amount of food eaten at each meal to six to eight percent of the previous amount; ② Adjusting the nutrition ratio: increasing the proportion of protein in the diet, reducing the proportion of fat and (refined) carbohydrates, i.e., eating more poultry, fish, meat, eggs and soybean products at lunch and dinner, and giving priority to such products, while choosing light and low-fat ③ The main source of carbohydrates in general is staple foods, and wheat grains contain gluten, the human body will have varying degrees of intolerance to gluten, which in turn may cause diarrhea-type irritable bowel syndrome, so it should be avoided, temporarily brown rice, millet, corn quinoa, mixed beans or potatoes as the main food. ④ More fluid and less solid: soup and soup type is more appropriate than solid main and side food forms.