Caffeine Effects: Withdrawal, Sleep & Health Impact

Caffeine impacts everything from sleep quality to concentration and heart rate. Learn how long withdrawal takes, the diuretic effects on the body, and the potential risks of taking caffeine tablets with medication or alcohol.

fresh fruits  in a spanish market

Does an Apple Have More Caffeine Than Coffee?

According to "The Goodman and Gilman Manual of Pharmacology and Therapeutics," caffeine, which is a stimulant found in many foods, is the most widely-used psychoactive drug in the world. Although coffee has a high caffeine content, apples do not. Therefore, there is more caffeine in a cup of coffee than in an apple.

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