Physicians and allergy experts say tests for food sensitivities or intolerance that are sold to consumers are not based in science, can lead to false positives and lead people to stop eating harmless foods. Removing and then slowly reintroducing foods to a diet is the best way to identify intolerance, which is an unpleasant reaction to food, unlike allergies, which involve the immune system.
http://www.chicagotribune.com/health/ct-met-food-intolerance-tests-20120411,0,3665500.story
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