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Does caffeine cause insomnia?

ANSWER

Your body quickly absorbs caffeine. But it also gets rid of it quickly. It takes about five to seven hours, on average, to eliminate half of it from your body. After eight to 10 hours, 75% of the caffeine is gone. For most people, a cup of coffee or two in the morning won't interfere with sleep at night. But if you get caffeine later in the day, it can mess up your sleep that night.

Most people are OK if they avoid caffeine for at least six hours before going to bed. But some people are more sensitive to caffeine.

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 increase the risk of osteoporosis, heart disease, and cancer?

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