Your body cannot tell the difference between hunger and dehydration. As an adult, our bodies are made up of over 50% water. If your mouth is dry or you are thirsty, you are already in the beginning stages of dehydration. For optimal health, drink 3 liters of water a day. This may seem impossible to some, but start out with with less and work your way up to the 3 liters. Next time you feel hungry, drink a glass of water, and see how you feel. I bet you won't feel nearly as hungry. Also, get into the habit of drinking a full glass of water before each meal. You are sure to consume less calories. Each week focus on adding one thing to your routine, and before you know it, you will have made some huge strides!