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.
Many over-the-counter weight-loss supplements contain caffeine because of its potential effects on metabolism and weight. Whether or not caffeine can bring about a slight increase in weight loss, however, may depend at least in part on the source, and how long you've been consuming caffeine.
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Tea, coffee, cola and chocolate all contain caffeine, which acts as a stimulant and can interfere with the absorption of certain nutrients when you get large amounts in your diet. People with iron deficiencies are often advised to avoid caffeine due to its potential to reduce iron absorption.
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