What is the estimated daily water intake recommendation for adults?

The estimated daily water intake recommendation for adults suggests that women should aim for about 2.7 liters and men for about 3.7 liters. This recommendation encompasses all fluids consumed, including water obtained from beverages and food.

This guideline is based on research that indicates adequate hydration helps maintain various bodily functions, including temperature regulation, nutrient transport, and waste elimination. The distinction in water needs between genders is largely attributed to differences in body size, muscle mass, and overall metabolic demands. Since men typically have a higher body mass and muscle content, their hydration needs are slightly greater.

The values provided in this recommendation also consider variations depending on activity levels, climate, and individual health conditions, suggesting that some may require more or less fluid than these general guidelines. These recommendations align with the total daily water intake established by health authorities, which takes into account both drinking water and water consumption from food sources.