There are a number of ways to test for food and chemical hypersensitivities. These hypersensitivities are often major contributing factors to a myriad of chronic symptoms as well as autoimmune and degenerative diseases. Immune system sensitivity to foods and chemicals sets off a cascade of metabolic dysfunction, which impacts all tissues and systems of the body.
The test I have the greatest experience with for identifying food sensitivities is an IgG4 antibody profile from Metametrix (now Genova) Laboratory. This test measures IgG4 antibody levels to 90 different foods. IgG4 antibodies are involved in delayed immune responses, which may not occur for up to 72 hours after eating the offending food. I have been using the test for about twenty years. This test is about $237.
Recently, I have learned about a test that has been available for less than a year. It is the Multiple Food Immune Reactivity Screen (also known as Array 10) by Cyrex Laboratories. I am convinced that this test is far superior to any other food sensitivity test. The value in this test is exemplified by my experience in testing patients and finding reactions to salmon, flax seeds, green tea, garlic, spinach, turmeric, and red wine. These "health foods" are good for the average person... but there are no average persons. Everyone is unique. Green tea can be great for your health but not if it is causing your immune system to go on the warpath. If you are dealing with chronic health challenges or just want optimal wellness, this test can be key. Be prepared to make some radical dietary changes. It may be necessary. This Cyrex food test is the most accurate test of its type and offers several important innovations (see link to file below). The cost for this 180 food panel is $695.