Water: How much should you drink every day? Show
Water is essential to good health. Are you getting enough? These guidelines can help you find out. By Mayo Clinic StaffHow much water should you drink each day? It's a simple question with no easy answer. Studies have produced varying recommendations over the years. But your individual water needs depend on many factors, including your health, how active you are and where you live. No single formula fits everyone. But knowing more about your body's need for fluids will help you estimate how much water to drink each day. What are the health benefits of water?Water is your body's principal chemical component and makes up about 50% to 70% of your body weight. Your body depends on water to survive. Every cell, tissue and organ in your body needs water to work properly. For example, water:
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 U.S. National Academies of Sciences, Engineering, and Medicine determined that an adequate daily fluid intake is:
These recommendations cover fluids from water, other beverages and food. About 20% of daily fluid intake usually comes from food and the rest from drinks. What about the advice to drink 8 glasses a day?You've probably heard the advice to drink eight glasses of water a day. That's easy to remember, and it's a reasonable goal. Most healthy people can stay hydrated by drinking water and other fluids whenever they feel thirsty. For some people, fewer than eight glasses a day might be enough. But other people might need more. You might need to modify your total fluid intake based on several factors:
Is water the only option for staying hydrated?No. You don't need to rely only on water to meet your fluid needs. What you eat also provides a significant portion. For example, many fruits and vegetables, such as watermelon and spinach, are almost 100% water by weight. In addition, beverages such as milk, juice and herbal teas are composed mostly of water. Even caffeinated drinks — such as coffee and soda — can contribute to your daily water intake. But go easy on sugar-sweetened drinks. Regular soda, energy or sports drinks, and other sweet drinks usually contain a lot of added sugar, which may provide more calories than needed. How do I know if I'm drinking enough?Your fluid intake is probably adequate if:
Your doctor or dietitian can help you determine the amount of water that's right for you every day. To prevent dehydration and make sure your body has the fluids it needs, make water your beverage of choice. It's a good idea to drink a glass of water:
Should I worry about drinking too much waterDrinking too much water is rarely a problem for healthy, well-nourished adults. Athletes occasionally may drink too much water in an attempt to prevent dehydration during long or intense exercise. When you drink too much water, your kidneys can't get rid of the excess water. The sodium content of your blood becomes diluted. This is called hyponatremia and it can be life-threatening. Sign up for free, and stay up
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. How many water bottles a day is too much?As drinking too much water can disrupt your body's electrolyte balance and lead to hyponatremia, 3 liters (100 ounces) may be too much for some people.
What happens if you drink 6 water bottles a day?A buildup of fluid in the brain is called cerebral edema. This can affect the brain stem and cause central nervous system dysfunction. In severe cases, water intoxication can cause seizures, brain damage, a coma, and even death. Bottom line: Drinking too much water can increase the pressure inside the skull.
How many bottles of water should you have a day?As a general rule, men need about 10 cups of fluids every day and women need about 8 cups (add another cup a day if you are pregnant or breastfeeding). Babies need 0.7 to 0.8 litres of fluid a day from breast milk or formula, while children need between 4 cups (for 1-year-olds) and 6 to 8 cups a day (for teenagers).
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