You’ve probably heard the advice countless times: “Start your day with a glass of water.” But is this habit truly backed by science, or is it just another wellness myth? While hydration is essential for the body—supporting temperature regulation, nutrient delivery, joint health, and overall function—the timing of water intake may not be as important as many believe.

Drinking water in the morning can help replenish fluids after sleep, but research shows that consistent hydration throughout the day matters far more than when you drink your first glass. Claims that morning water dramatically boosts metabolism, improves skin, detoxifies the body, or enhances mental clarity lack strong scientific support. Similarly, while water may aid weight management by promoting fullness, its effect depends more on overall lifestyle than timing.

Popular practices like Japanese water therapy may improve hydration, but evidence for treating serious conditions is limited. Ultimately, the key to health is balanced, regular hydration—listening to your body rather than following rigid rules.