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Does caffeine have a dehydrating effect?

ANSWER

Caffeine can make you need to urinate. However, the fluid you consume in caffeinated beverages tends to offset the effects of fluid loss when you urinate. The bottom line is that although caffeine does act as a mild diuretic, studies show drinking caffeinated drinks in moderation doesn't actually cause dehydration.

From: Caffeine Myths and Facts WebMD Medical Reference

SOURCES:

International Food Information Council Foundation: "Caffeine & Health: Clarifying the Controversies."

Nutrition Action Health Letter: "Caffeine: The Good, the Bad, and the Maybe."

European Food Information Council (EUFIC): "Myths and Facts about Caffeine."

Johns Hopkins University Bayview Medical Center: "Information About Caffeine Dependence."

Reviewed by Melinda Ratini on April 30, 2017

SOURCES:

International Food Information Council Foundation: "Caffeine & Health: Clarifying the Controversies."

Nutrition Action Health Letter: "Caffeine: The Good, the Bad, and the Maybe."

European Food Information Council (EUFIC): "Myths and Facts about Caffeine."

Johns Hopkins University Bayview Medical Center: "Information About Caffeine Dependence."

Reviewed by Melinda Ratini on April 30, 2017

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Does caffeine harm children?

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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.

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