Skip to content Popular routines such as Japanese Water Therapy advocate drinking multiple glasses of water immediately upon waking, sometimes in large quantities. While these practices may help people remember to hydrate consistently, the majority of the health claims tied to these rituals—including boosting metabolism or purifying the bloodstream—lack robust scientific support. In some cases, consuming excessive water too quickly can even pose risks, such as temporary electrolyte imbalances or discomfort from a sudden increase in stomach volume. Instead of focusing on rigid routines or specific times, the most evidence-based approach is to maintain steady, consistent hydration throughout the day, adjusting for personal factors such as physical activity, ambient temperature, age, and individual health status.
