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What to know before trying at-home food sensitivity kits

At-home food sensitivity or intolerance tests say they can get to the root of what foods are causing everything from bloating to headaches to joint pain with no prescription or doctor's visit required. Now, the American Academy for Asthma, Allergy, and Immunology is warning against using all intolerance tests due to lack of sufficient scientific evidence. NBC's Vicky Nguyen reports for TODAY.

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