Is it true that caffeine-containing drinks have a diuretic effect and result in a loss of fluid?

No. Despite the popularity of this long-held belief – even among some health professionals – research does not support it. While it’s true that caffeine in large amounts can temporarily increase urinary fluid loss, studies show that beverages containing moderate amounts of caffeine, like coffee, tea and soft drinks, hydrate our bodies just as well as drinks without caffeine.

When it comes to calculating daily fluid intake, caffeinated drinks should be counted along with other liquids. Q: How accurate are scales that claim to measure body fat percentage? A: These scales merely estimate body fat by measuring how much resistance your body provides to a tiny electrical current.

The scales rely on bioelectric impedance analysis (BIA), which evaluates how current is slowed or stopped as it passes through various materials. More body fat equals more resistance. Based on that resistance and other information you enter (including height, gender and age), the scale uses predetermined formulas ... more.

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