Why do we need water? 60 percent of the body weight is water. Every system in the body depends on water. For example, water protects vital organs and tissues, carries nutrients and oxygen to your cells, lubricates the joint, helps dissolve nutrients and minerals to make them accessible to the body, and regulates body temperature.

Every day you lose water through your breath, perspiration, urine and bowel movements. Lack of water can lead to dehydration. Even mild dehydration can sap your energy levels and leave you feeling tired.

Since water is the single largest component of our body and brain, how much water do we require to drink everyday? Different studies reveal different quantities of water every now and then. There is a simple science that can help you calculate how much water you need every day.

Quantity of water for individual depends on many factors, much like diet planning. Key factors to be considered are your gender, activity level, climatic conditions, and your general health. Though this a broad calculation knowing more about your body's need for fluids will help you estimate how much water to drink each day.

An average healthy male adult living in temperate climate (neither too hot nor too cold) requires roughly 13 cups or 3 liters of water. This includes beverages, water in food etc. While An average healthy female adult living in similar climate requires roughly 2.2 liters or 9 cups of water a day.

The common saying is that one must drink at least 8-10 glasses a day. Based on this simple logic it means 2.5-3 liters which is what an average daily requirement really is. Emphasis on 8-10 glasses is to simply make it easier for people to calculate.

Is there anything such as too much consumption of water?

May be, if you are consuming more than 15 liters a day! Did you know the kidneys of a healthy adult can process fifteen liters of water a day? You are unlikely to suffer from water intoxication, even if you drink a lot of water, as long as you drink over time as opposed to in taking an enormous volume at one time.