Water is needed to regulate body temperature and to provide the means for nutrients to travel to all our organs. Water also transports oxygen to our cells, removes waste, and protects our joints and organs. Our bodies are estimated to be about 60 to 70% water. Blood is mostly water, and our muscles, lungs, and brain all contain a lot of water.
Major Sources Of Water-Loss
We lose water through urination, respiration, and by sweating. If you are very active, you lose more water than if you are sedentary. Diuretics such as caffeine and alcohol result in the need to drink more water because they trick our bodies into thinking we have more water than we need.
Major Sources Of Water-Gain
The best source of water is plain, pure drinking water.
Sodas have a lot of sugar in them and aren't a good source.
Herbal teas that aren't diuretic are fine.
Sports drinks contain electrolytes and may be beneficial.