How Just 2% Dehydration Can Cut Productivity by 25%
Even mild dehydration can affect concentration, mood, memory, reaction time, and overall work output. Research shows that losing just 2% of your body’s water can reduce productivity by up to 25% and increase cognitive errors more than people realize. This article explains why hydration affects the brain so quickly, what 2% dehydration actually looks like in everyday life, how lifestyle factors like caffeine, sodium, heat, and exercise contribute to hidden dehydration, and why checking hydration markers—like urine specific gravity—can help you stay ahead of fatigue and performance drops. At-home hydration testing provides a simple, fast way to understand your fluid balance throughout the day.