We can live weeks without food, but no more than a week without water. For health, we need a balance of fluids for all of our cells to function properly.
Our bodies consists of from 50% to 80% water. These fluids are what carry nutrients, waste products, and minerals to our cells. The fluid in our bodies can be divided into two main groups: There is fluid inside our cells (intracellular fluid) and fluid outside our cells (extracellular fluid). In a healthy person, the intracellular water should be about 40% of your total weight, and your extracellular fluid around 20% of your total weight. Fat cells do not contain a lot of water, so if you are overweight, you will have less intracellular water than a thinner person.
When you drink, water is absorbed slowly from the intestinal tract. The maximum absorption is around a quart per hour.
This in turn stimulates a part of the brain to cause the sensation of thirst. Normally, the brain then monitors the amount of fluid being taken in to return the normal balance in the extracellular fluid. This, of course, is dependent on what you drink.
If you choose to drink a diuretic such as an alcholic beverage, you will quickly become thirsty again, drinking more to attempt to bring your body back into equilibrium. Choosing alcohol products will slowly increase your need to drink in an attempt to get back into balance but, instead, will most likely lead to over-consumption of alcohol. If you choose a beverage with high sugar content, such as soda, you will take in excess calories trying to bring your body back into balance.
As you might imagine, many people do not drink enough water. If you are on the low intake side, you are more prone to constipation, kidney stones, and decreased physical performance.
There are many different formulas to determine how much water you should drink. One states that you should have from 1 to 1.5 ml of water for every calorie of food that you eat. Another states that you should simply drink from six to eight glasses per day. The problem with these and similar systems is that they do not take into account such variables as body size, outside temperature, physical activity, etc.
A simpler method states that your kidneys should be outputting urine at a specific rate. That means that, if you are taking in enough water, you should have to urinate every two to three hours during the day. If you adjust your fluid intake to maintain this rate, you should have adequate water intake to keep your body fluid levels functioning as they should.
you do not have enough water in your body and its cells,
An excellent book for further reading is ³Your Bodyıs Many Cries For Water,² by F. Batmanghelidj, M.D.
HOW IS WATER USED IN THE BODY?
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