What can patients with irritable bowel syndrome eat in the diet? The following are some of the more convincing dietary recommendations from current research. 1, dietary fiber Dietary fiber is a polysaccharide food component that is not easily digested by digestive enzymes, mainly from the cell wall tissue of plants, including cellulose, hemicellulose, pectin, resin, etc.. It cannot be absorbed and digested in the human small intestine, while it can be partially or completely fermented in the large intestine. Among them, insoluble fiber can increase the volume of feces, reduce the transmission time of the intestine and increase the excretion volume; soluble fiber can participate in the fermentation process of the intestine, reduce the pH value of the large intestine, and have a role in regulating the intestinal flora. For constipation type irritable bowel syndrome patients consume oats, flaxseed can improve constipation and abdominal discomfort symptoms. 2, low short-chain carbohydrate diet Short-chain carbohydrates such as fermented oligosaccharides, monosaccharides, disaccharides, polyols. These components are difficult to absorb in the small intestine, which can increase the osmotic pressure in the large intestine and cause gastrointestinal discomfort due to bacterial fermentation in the colon, so foods with high short-chain carbohydrate content need to be avoided. Foods recommended for low short-chain carbohydrates are: grapes, bananas, oranges, tangerines, strawberries, carrots, tomatoes, cucumbers, mung bean sprouts, lettuce, cabbage, lettuce, potatoes, oats, buckwheat, corn flour, rice. It is worth mentioning that care needs to be taken to avoid intake, foods high in short-chain carbohydrates are: asparagus, beetroot, cauliflower, black beans, broad beans, adzuki beans, string beans, soybeans, garlic, onions, mushrooms, apples, mangoes, pears, watermelon, barley, bran, coarse wheat flour, various types of processed meats such as sausages, coconut milk, lactose-free milk. It is important to note that the principle of a low short-chain carbohydrate diet is an overall reduction in the intake of foods high in short-chain carbohydrates, rather than a one-sided prohibition of certain foods. Overall it needs to be individualized according to the patient’s specific condition and symptoms.