- Water is also
included as a macronutrient source. Every living organism consists
mostly of water, the
human muscles are comprised of over 70% water. All living things require
a lot of water to
maintain normal life processes, and also must maintain its water supply near normal, or
death will occur. Humans can live without food for more than two months, but cannot live
for more than a week without water.
-
- If the body loses more than 20% of
its normal water content, a painful death will occur. Water is the basis of all the bodily
fluids including digestive juices, blood, urine, lymph and perspiration, digestion,
circulation and lubrication. Water is also an essential transport mechanism for several
nutrients such as vitamins, minerals and even carbohydrates. It serves an important role
in all cellular activity. A diet deficient in water results in thirst, and dehydration.
Humans must take in about 1 1/2 quarts (2.4 L) of water daily. This can be in the form of
beverages or by water in food.
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