Water: What quantity should you drink every day?

Water is essential to good health, yet, its need vary by individual. These guidelines can help ensure you drink enough fluids.

What quantity of water should one drink each day? Studies have produced varying recommendations over the years, but in truth, your water needs depend on many factors, including your health, how active you are and where you live. Although no single formula fits everyone, knowing more about your body's need for fluids will help you estimate how much water to drink each day.

Health benefits of water

Water is your body's principal chemical component and makes up about 6 0 percent of your body weight. Every system in your body depends on water. For example, water flushes toxins out of vital organs, carries nutrients to your cells and provides a moist environment for ear, nose and throat tissues.

Lack of water can lead to dehydration, a condition that occurs when you don't have enough water in your body to carry out normal functions. Even mild dehydration can drain your energy and make you tired.

How much water do you need?

Every day you lose water through your breath, perspiration, urine and bowel movements. For your body to function properly, you must replenish its water supply by consuming beverages and foods that contain water.

So how much fluid does the average, healthy adult living in a temperate climate need? The Institute of Medicine determined that an Adequate Intake (AI) for men is roughly 3 liters (about 13 cups) of total beverages a day. While for women, it is 2.2 liters (about 9 cups) of total beverages a day.

What about the advice to drink eight glasses a day?

Everyone has heard the advice, "Drink eight 8 glasses of water a day." That's about 1.9 liters, which isn't that different from the Institute of Medicine recommendations. Although the "8 by 8" rule is not supported by hard evidence, it remains popular because it's easy to remember.

Just keep in mind that the rule should be reframed as: "Drink at least eight 8- glasses of fluid a day," because all fluids count toward the daily total.

By Chris Anthony

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