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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.

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 June 19, 2019

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 June 19, 2019

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