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How do tea and coffee help me burn calories?

Caffeine does increase metabolism for several hours after it is ingested. For this reason one to two cups of a caffeinated beverage is all that is recommended for most people. The caffeine in coffee may raise blood pressure in people who already have hypertension. Coffee may also aggravate an existing ulcer and it can increase calcium excretion, which is bad for your bones. Caffeine is also a diuretic; it causes water to be excreted. Too much caffeine can result in mild or severe dehydration.
Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
Coffee is a stimulant that contains caffeine. It can help you stay awake and also boost energy expenditure and speed up metabolism. So don't be afraid to drink a cup of Joe.

Green tea has compounds called phenols that have great thermogenic properties beyond that explained by its caffeine content. Give the green light to green tea and drink it hot or cold to promote energy expenditure.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.