Like most things in medicine, the amount of liquid you should drink seems to be constantly changing. So just how much do you need to drink on a daily basis for optimal health? You're about to find out that the scientific world has determined about your drinking needs. So turn on the tap and get ready to find out how full you should fill your glass. Only a few years ago, the medical community had a nice, one-size-fits-all answer to the liquid question. According to the experts, adults needed about eight glasses of water each day. This equaled out to approximately 64 ounces of water. While this acted as a good goal for most adults, it was a goal that was rarely met due to people simply being too busy to remember to down their daily regimen of water. Today, the old answer is no longer the only answer. Granted, it is still an accepted answer that helps many people remember to keep their lips to a glass of water, but researchers spent plenty of time studying just how much water a pe...