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What are the beverages that hydrate and dehydrate?

Dr. Michael Roizen, MD
Internal Medicine
The word hydrate comes from the Greek word for water, so the best hydrating beverage is water. It quenches your thirst, has no calories, and costs nothing. That being said, if you're doing hot yoga or taking a spinning class that lasts more than an hour and leaves you drenched, you might want to consider a sports drink. Diluting it with water will still give you the electrolytes you need to re-hydrate yourself, but minimize the extra sugar and calories.

In terms of dehydrating you, alcohol is a biggie. There are theories that caffeinated beverages dehydrate you, but there’s enough fluid in them to counteract the diuretic effects of caffeine, so you don’t actually get dehydrated.
 
Bottom line, stick to water. It’s the best of the best.

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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.