Approximately 60% of the human body is water, essential for functions like temperature control, digestion, and nutrient transport. While drinking water first thing in the morning is believed to rehydrate the body, “this isn’t entirely true.” Urine color is not a reliable hydration indicator, and timing doesn’t significantly enhance benefits like mental performance or skin health. Hydration matters throughout the day.

Water may aid weight loss by promoting fullness and boosting metabolism, though timing has little effect. Daily water needs vary by factors like age and activity, and the “8×8 rule” is a general guideline. Stay consistently hydrated for health.