Our life cannot exist without water. We must constantly be adding fresh water to our body in order to keep it properly hydrated. We can go for weeks without food, but only days without water. Our body is made up of 75% of water. Water forms the basis of blood, digestive juices, urine and perspiration, and is contained in lean muscle, fat and bones.
As our body can’t store water, we need fresh supplies every day to make up for losses from the lungs, skin and urine. The amount we need depends on our body size, metabolism, the weather, the food we eat and our activity levels.
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