Friday, March 7, 2008

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Don't Be Fooled By Water Weight Losses
WATER
VITAL FOR LIFE
Two parts hydrogen and one part oxygen(H20), water is the most abundant substance in the human body, accounting for up to 60 percent of our body weight. Even though water has no calories or other nutrients, we can go for only few days without it. In contrast, a healthy person can survive for 6 to 8 weeks without food. A loss of only 5 to 10 percent of body water results in serious dehydration, while a 15 to 20 percent loss is usually fatal.

VITAL FUNCTIONS
Water is essential to virtually every body function, including digestion, absorption, and transport of nutrients, elimination of body waste, and regulation of body temperature, as well as many other chemical processes. It provides a protective cushion for body cells, and in the form of amniotic fluid protects a developing fetus. Water is needed to build all body tissues and is the base of all blood and fluid secretions such as tears, saliva and gastric juices, as well as the fluids that lubricate out organs and joints. It also keeps our skin soft and smooth.


HOW MUCH DO WE NEED?
The human body needs enough water to ensure that the urine is pale, not dark or bright yellow. For the average adult this may translate to six to eight glasses of water a day. Most of this comes from drinks-plain water, coffee, tea, juices, soft drinks-but surprisingly there’s a substantial amount in foods as well.
Our daily needs vary a lot. We need more water in hot weather, during exercise, or when we have a fever, cold or other illness. We also need more during pregnancy to provide for the amniotic fluid and the expanded blood volume, as well as to meet the needs of the developing fetus.
As a general rule, the amount of water we take in should be equal to what is excreted. Many factors can affect this balance. For example, taking diuretics or other drugs that increase urination increases our needs for fluids. Drinking large amount of tea or coffee has a similar diuretic effect, which can offset the fluid intake from these drinks. And eating salty foods also increase our needs for extra water to maintain proper fluid balance.

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