User:April Roberta Ludgate/sandbox

Water consumption
The amount of water needed varies between and within individuals, as it depends on many factors including health status, body composition, physical activity level, environmental conditions (i.e., temperature and humidity), and diet (i.e., solute load and macronutrient composition). In the US, the dietary reference intake (DRI) for water is 3.7 litres per day (L/day) and 2.7 L/day for men and women over 18 years old, respectively, including water contained in food, beverages, and drinking water. The DRI for water is considered an Adequate Intake as there is insufficient evidence to determine a Recommended Dietary Allowance. The common misconception that everyone should drink two litres (68 ounces, or about eight 8-oz glasses) of water per day is not supported by scientific research. Various reviews of all the scientific literature on the topic performed in 2002 and 2008 could not find any solid scientific evidence that recommended drinking eight glasses of water per day. For example, people in hotter climates will require greater water intake than those in cooler climates. An individual's thirst provides a better guide for how much water they require rather than a specific, fixed number. A more flexible guideline is that a normal person should urinate 4 times per day, and the urine should be a light yellow color.

A constant supply is needed to replenish the fluids lost through normal physiological activities, such as respiration, perspiration and urination. Food contributes 0.5 to 1 L/day, and the metabolism of protein, fat, and carbohydrates produces another 0.25 to 0.4 L/day, which means that 2 to 3 L/day of water for men and 1 to 2 L/day of water for women should be consumed as fluid to meet the Recommended Daily Intake (RDI).