How much water should you drink? Studies show that most people are dehydrated. Sometimes when we think we're hungry we are really just thirsty. Try to drink 1/2 your body weight in ounces. For example if you weight 160 lbs., drink 80 oz of water. I drink a glass when I wake up and before bed, and before every meal and every snack (6 x during the day) Hope this helps! Keep on Flexing!