Is food sensitivity testing effective?

Some tests determine your sensitivity to hundreds of foods and ingredients by measuring the “biological origin” of your hair, an unproven technique used in holistic or complementary medicine. Supplements involve measuring the wavelengths of energy coming from your body. Others measure the levels of certain antibodies, called IgG antibodies, in your blood.

There are still other tests, called Alcate and MRT Dr. John M. Kelso, an allergist at Scripps Clinic Carmel Valley in San Diego says:

Next to breath test Tamara Duker Freuman, a registered dietitian at New York Gastroenterology Associates in New York City, says gastroenterologists sometimes use it to diagnose certain intolerances, such as lactose or fructose. The only way to determine if you are sensitive to certain foods or ingredients is to see how your symptoms change after eliminating them from your diet, ideally. with the help of a dietitian or doctor, she says.

This can be a slow process involving trial and error, and companies that sell food sensitivity tests market them as a shortcut. But health organizations, including those in USA, Europe and Canadarecommended against the use of food sensitivity or intolerance tests because of the no good evidence in which they operate.

“Nothing in your hair tells you anything about your sensitivities to foods,” says Dr. Kelso. And the antibodies measured in IgG tests are produced as part of the immune system’s normal response to food; they have not been shown to correlate with symptom or merciless, Dr. Stukus said. “It’s really just a reflection of what you’ve eaten.”

Similarly, the way blood cells in vitro interact with food extracts, as in the Alcat and MRT tests, can be different from how they are exposed to them in the body, Dr. speak. None of these trials had to go through the kind of high-quality clinical trial needed to confirm their usefulness to patients, he added. (Oxford Biomedical Technologies, which sells the blood cell MRT test, did not respond to a request for comment.)

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