Drinking water is crucial for health and well-being, but many people do not consume enough each day. Here are 3 evidence-based health benefits of drinking plenty of water: 1. Helps Maximize Performance. Losing as little as 2% of your body’s water content can significantly impair your physical performance. 2. Affects Brain Function. Mild dehydration (fluid loss of 1–3%) can decrease energy levels, impair mood, and lead to major reductions in memory and brain performance. 3. May Help Treat Kidney Stones. Higher fluid intake increases the volume of urine passing through the kidneys. This dilutes the concentration of minerals, so they’re less likely to crystallize and form clumps.