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How does alcohol dehydrate?

Alcohol is a diuretic, which means it makes your body produce more urine. This increased urination causes you to lose more fluids than you're taking in, leading to dehydration. The dietitian specifically warns against alcohol during a heatwave because this dehydrating effect is amplified when your body is already losing fluids through sweat.

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Avoid ultra-processed foods and alcohol in a heatwave

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