The problems appear to be linked to intake of carbohydrates that are hard to digest. Other onsets could be linked to foods that are offensive in the digestive system. Medical researchers are also hunting for special compounds from digestion in blood samples from the patients. They think the cause of food intolerance and
the three disorders will be found in the intestines. They suspect the culprit is intestinal flora. Indigestible carbohydrates, which recreate the patients’ symptoms, are not absorbed in the small intestine but are fermented by microbes in the large intestine.
One way to see if your symptoms may be the result of food allergies is to ask your PCP provider for a simple blood test and try to avoid those foods that come up positive even if the totals are minimal. A blood test can measure your immune system's response to particular foods by checking the amount of allergy-type antibodies in your bloodstream known as immunoglobulin E (IgE) antibodies. For this test, a blood sample taken in your doctor's office is sent to a medical laboratory, where different foods can be tested. However, these blood tests aren't always accurate.
To get a more accurate assessment one should be referred to an allergist. Be prepared to tell your doctor a history of your symptoms which foods, and how much, seem to cause problems, and whether you have a family history of food allergies or other allergies. A scheduled food allergy skin prick test may be ordered. A skin prick test can determine your reaction to a particular food. In this test, a small amount of the suspected food is placed on the skin of your forearm or back. Your skin is then pricked with a needle to allow a tiny amount of the substance beneath your skin surface. By avoiding any foods that may be suspected, you may find your flare-ups decrease over time.