There is no reliable test to diagnose gluten sensitivity, according to Murray, so whatever your nutritionist ordered is not medically approved.

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People who feel they are gluten-sensitive but do not test positive for celiac disease do not have celiac disease.

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"If anyone claims they have a test that is specifically for gluten sensitivity, there is no such thing, though I'm not ruling it out in the future, " says Dr. Fasano.

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