Good medicine and good health are not one size fits all. Therefore, if you are experiencing any type of health problem, you should see a doctor.
Common sense in your diet goes a long way! Nutrient rich foods contribute to good digestion. Pay attention to foods which cause discomfort and gradually replace them with foods that work better within your system.
Although raw fruits and vegetables are very healthy, they can induce the formation of too much gas and thus, lead to bloating and abdominal cramping. Some of the biggest culprits for painful gas formation are raw carrots, peppers, onions and chick peas. Cooked culprits include cabbage, cauliflower and brussel sprouts. Fruits that form painful gas include cantaloupe and Honeydew melons.
Some people cannot digest milk products. Even if you do not see a direct correlation between a milk product that you have eaten the same day you get gas, cramping and maybe diarrhea, realize that it can take 2 weeks for a "milk product" to get through your system. The gas can continue to accumulate in your system and then give you an "attack" several days later.
Irritable bowel syndrome usually does not have a specific food that consistently gives symptoms. It is harder to figure out what kind of diet to be on. For most people with irritable bowel syndrome, it is better to avoid raw fruits and vegetables and milk products in general. More "gentle" fiber such as whole wheat bread, fiber-rich cereals and even fiber supplements are a better source of fiber. Fiber has to be slowly increased in your diet. If you were to pick a cereal with fiber, you would pick one with 6-8 grams of fiber to start. Likewise, a fiber product should only be started at ONE tablespoon or pill a day and only increase to 2 after 2 weeks.
Foods/drinks with high sugar or fat content are not healthy. Likewise, foods/drinks that have sugar substitutes can actually cause diarrhea.
Diets should consist of a good amount of protein such as lean meat(in moderation), fish, nuts, and legumes (lentils, chickpeas, soy, beans, etc.). Amaranth and quinoa (pronounced Kin-Wah) are grains from Central and South America, respectively, which are full protein grains and can be safely consumed by people who have celiac disease (provided they are not processed in a plant that also processes wheat, barley or rye). Quinoa is a good substitute for rice, oats or barley. You can also cook it in apple juice with chopped walnuts or pecans and blueberries or raisins and a pinch of salt and serve it hot or cold during any time of day.
The key to a healthy diet is to balance your diet. You still need a small amount of fat and carbohydrate in your diet. Don't eliminate these from your diet.