As baffled suggested, the idea that caffeine is a diuretic and dehydrates you has been debunked by recent research. People had assumed that, but not tested it. The research indicates that when people first start to drink caffeine there is a small diuretic effect, but that our bodies adapt pretty quickly.
I've seen this research reflected in more recent advice, which suggests that you can count caffeinated beverages as water. However, that being said, there may be many other reasons why people might prefer to drink water over caffeine.
Last edited by Heather; 09-20-2007 at 08:53 PM.
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