Brief Answer: Avoid fatty, spicy and high carbohydrate diet Detailed Answer: Hello, I have studied your case. In all three diseases you have to keep in mind that you need to avoid fatty, spicy and high carbohydrate diet. And you need to focus on high fibre, moderate protein and high mineral and vitamins in diet. The IBS patients were more likely to develop physical symptoms of lactose intolerance than the healthy So you need to avoid them. A high-fiber diet was thought to be the best diet for almost everyone with IBS For people with constipation, it's common to try a high-fiber diet of 25 grams daily for women. People should eat as much dietary fiber as they can tolerate, and understand that a certain amount of gas production is a sign of healthy gut microbes at work. The challenge is finding an acceptable fiber intake without experiencing debilitating abdominal pain and bloating, and frantic dashes to the toilet. And sometimes focusing on fiber alone doesn’t address the removal of potential trigger foods from the diet. You need to avoid Foods that are high in fat, fried foods, spicy foods, alcohol, and caffeinated coffee and tea can be problematic. Some foods, such as beans, cabbage, broccoli, Brussels sprouts, cauliflower, peas, onions, and bagels, that can cause minor discomfort in a normal GI tract can cause significant bloating, gas, and abdominal pain in IBS sufferers. Sugar – includes soft drinks, fruit juices, fructose, sucrose, agave and the obvious cookies, cakes, etc. Starch – both potatoes and rice are high in starches; which means they are high in carbs. Grains – especially wheat (gluten) in ANY form; flour, pasta, breads, crackers, cakes, Trans fats, hydrogenated oils - including corn and vegetable oils. Ditch the canola oil and bring back the real butter! Cereals – All kinds. Legumes – including beans and peanuts (peanuts are technically a legume and not a nut). Pasteurized milk High Carb Fruits - especially bananas and pineapple. High Carb Vegetables – avoid potatoes. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care

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