PREVIOUS QUESTION:

 

NEXT QUESTION:

 

How can a hydrogen breath test help to diagnose a food intolerance?

ANSWER

Your doctor may recommend a test called a hydrogen breath test, which you can take at her office. Depending on what she thinks your intolerance might be, she'll give you a drink with large amounts of lactose, fructose, sucrose, or glucose. She'll then test your breath every 15 minutes to check the amount of hydrogen or methane. If you have too much of one of these, it shows that your body isn't able to break it down. That likely means you have an intolerance. For this test to work the way it should, you may need to eat a low-carb diet for a few weeks before testing.

SOURCES:

The British Allergy Foundation: "Identifying your Food Intolerances," "Sulphites and Airway Symptoms."

American Academy of Allergy Asthma and Immunology: "Food Allergy Overview," "Food Allergy."

Asthma and Allergy Foundation of America: "Food Intolerance."

Canadian Digestive Health Foundation: "Understanding FODMAPs."

Fedewa, A. and Rao, S.S.C, "Dietary fructose intolerance, fructan intolerance and FODMAPs."

Food and Drug Administration: "High Fructose Corn Syrup: Questions and Answers."

National Health Service (UK): "Diagnosing lactose intolerance."

National Institute of Allergy and Infectious Diseases: "Food Allergy: An Overview."

UpToDate: "Patient information: Food allergy symptoms and diagnosis (Beyond the Basics)."

University of Michigan Health System: "Hydrogen Breath Test."

Food Allergy Research & Education: "Facts and Statistics."

Reviewed by Carol DerSarkissian on June 18, 2018

SOURCES:

The British Allergy Foundation: "Identifying your Food Intolerances," "Sulphites and Airway Symptoms."

American Academy of Allergy Asthma and Immunology: "Food Allergy Overview," "Food Allergy."

Asthma and Allergy Foundation of America: "Food Intolerance."

Canadian Digestive Health Foundation: "Understanding FODMAPs."

Fedewa, A. and Rao, S.S.C, "Dietary fructose intolerance, fructan intolerance and FODMAPs."

Food and Drug Administration: "High Fructose Corn Syrup: Questions and Answers."

National Health Service (UK): "Diagnosing lactose intolerance."

National Institute of Allergy and Infectious Diseases: "Food Allergy: An Overview."

UpToDate: "Patient information: Food allergy symptoms and diagnosis (Beyond the Basics)."

University of Michigan Health System: "Hydrogen Breath Test."

Food Allergy Research & Education: "Facts and Statistics."

Reviewed by Carol DerSarkissian on June 18, 2018

NEXT QUESTION:

How can you prevent food intolerance?

WAS THIS ANSWER HELPFUL

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.

    Other Answers On: