The most common reason why people don't drink enough water is because they think it is not a serious disease. In reality, not drinking enough water can be very dangerous. In fact, the American Cancer Society estimates that about 58% of all people who die from cancer could have been saved if they had been more hydrated. Also, the American Heart Association states that people who are not hydrated tend to have higher risk of heart disease, stroke, and other illnesses. So, not only is it important to have a proper hydration, but it also is crucial to understand how much water your body needs each day. The more water you drink, the more likely you are to maintain a healthy weight and be in good shape.