Our body weight is approximately 60 percent water and uses water in every cell, organ, and tissue to help regulate temperature and maintain other bodily functions. Because your body loses water through breathing, sweating, and digestion, it’s important to rehydrate by drinking fluids and eating foods that contain water. The amount of water you need depends on a variety of factors, including the climate you live in, how physically active you are, and whether you’re experiencing an illness or have any other health problems.
Drinking around 2 ltrs of water per day is recommended. Our brains are around 70% water so if dehydrated cognitive function is affected.
Adequate water intake enables your body to excrete waste through perspiration, urination, and defecation. The kidneys and liver use it to help flush out waste, as do your intestines.
If you’re not sure about your hydration level, look at your urine. If it’s clear, you’re in good shape. If it’s dark, you’re probably dehydrated.