Do We Need to Drink Eight Glasses of Water a day?

Minggu, 10 April 2011

Suggestion that we always hear everywhere is that we should drink a half liter or eight glasses of water a day and night.

Is it true that advice?
Advice is a kind of dogma that has been questioned several years ago in a study by the University of Pennsylvania (USA). Scientists say that drinking more water is not useful and certainly did not help remove more toxins from the body. Whatever amount of water absorbed, in most cases will be disposed of again by the kidneys.
"In fact, drinking large amounts of water are surprisingly actually reduce the ability of the kidney as a filter. Decline slightly, but steadily, "said Dr. Stanley Goldfarb, kidney expert at the University of Pennsylvania. Most drinking water can also cause poisoning (water intoxication).
The water requirement varies among individuals, depending on energy expenditure, diet, and the weather:

Energy
We need 1 ml of water for every calorie that we spend. Women spend an average of 2,000 calories per day so it takes 2 liters of water. Men spend an average of 2500 calories per day so that it requires 2.5 liters of water. But you do not need to drink 2 or 2.5 liters per day to meet your needs.

All food, except sugar and oil, contain water. Fruits and vegetables contain an average of 90% water. When you eat fruits and vegetables in the correct amount is 300 g and 500 g per day, you've got a half liter of water (approximately 700 g). And if you dihindangkan in the form of vegetable soup, you even get more water again.When you eat rice and side dishes, you also get water. Their water content around 60-85%. Remember that most of the water is absorbed when the rice is cooked into the rice. Only a small portion of water that evaporates.
So, if you eat a balanced composition, you get more than 1.5 liters of water every day from the food you eat. You just need to get 0.5 to 1 liter of water from beverages or only 2-5 cups.

Diet and weather
In addition to energy expenditure, water requirements can vary by diet and weather.When you drink plenty of coffee, you will need more fluids. Caffeine causes the urge to urinate (is a diuretic), so that needs to be balanced with the addition of liquids. Salty foods also increase the need for water because salt water is binding.Within a few hours after you eat salty foods, you will feel thirsty, so a glass of water feels very refreshing for you.
Apart from diet, of course you need fluid decreases and increases in different weather. Hot weather make your body needs more fluid to cool the body.Conversely, in cold weather your body tends to not need a lot of fluids.