Most people do not get enough water per day, and it's easy to see why. With so many sugary juices, sodas, and other tempting drinks widely available, water can start to seem less appetizing. However, the body desperately needs water in order to function and be healthy. And, when you regularly deprive yourself of it, you can end up dehydrated. Dehydration is sneaky, however, and you might not notice it until you've already caused yourself some health problems.