It’s a common fact that our bodies are made of nearly 70% water, but why is it so important to take in 8 to 12 glasses a day? Perhaps, it is because over 75% of American’s are chronically dehydrated. Every organ in the human body needs water to function properly, especially the brain, which is composed of 85% water. Consider that dehydration is the number one cause of daytime tiredness and that a loss of just 2% water in our bodies can cause fuzzy short-term memory, trouble with basic math, and trouble focusing on a computer screen or a printed page.
A loss of 4 to 5% water can diminish work performance by 20 to 30%. Dehydration can occur in any season and athletes and children are particularly susceptible to it because of how quickly they tend to lose water. So even though the average person consumes nearly three cups of water through food, it is very important to take in the extra 8 to 12 glasses in order to perform at the highest level.