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What causes lactose intolerance?

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Lactose intolerance means that the body can’t digest the sugar in milk, called lactose. It happens when your body doesn’t make enough of the enzyme lactase, which the gut uses to break down lactose. It’s not a harmful condition, but it can keep you from getting the right amount of important nutrients like calcium and vitamin D, which most people get from dairy products.

SOURCES:

International Foundation for Functional Gastrointestinal Disorders: “Intro to IBS.”

Cleveland Clinic: “Lactose Intolerance.”

Johns Hopkins Medicine: “Lactose Intolerance.”

National Institute of Diabetes and Digestive and Kidney Diseases: “Lactose Intolerance,” “Irritable Bowel Syndrome.”

IBSClinic.org: “The Brain-Gut Connection.”

WomensHealth.gov: “Irritable bowel syndrome (IBS) fact sheet.”

International Foundation for Functional Gastrointestinal Disorders: “Changes You Should Not Ignore if You Have IBS.”

NHS: “Lactose Intolerance - Treatment.”

Reviewed by Minesh Khatri on February 14, 2020

SOURCES:

International Foundation for Functional Gastrointestinal Disorders: “Intro to IBS.”

Cleveland Clinic: “Lactose Intolerance.”

Johns Hopkins Medicine: “Lactose Intolerance.”

National Institute of Diabetes and Digestive and Kidney Diseases: “Lactose Intolerance,” “Irritable Bowel Syndrome.”

IBSClinic.org: “The Brain-Gut Connection.”

WomensHealth.gov: “Irritable bowel syndrome (IBS) fact sheet.”

International Foundation for Functional Gastrointestinal Disorders: “Changes You Should Not Ignore if You Have IBS.”

NHS: “Lactose Intolerance - Treatment.”

Reviewed by Minesh Khatri on February 14, 2020

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Is lactose intolerance related to any other digestive diseases?

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