Since the human body is about 60% water, replacing water that you lose through sweating and urinating is extremely important. If you drink less water than you lose, you could face some very serious health problems. Health authorities have long recommended drinking 2 liters (half a gallon) of water a day.
What happens when you drink less than a liter (1 quart) of water a day? Dehydration can be a serious medical issue. What are some of the most serious issues that chronic dehydration causes?