The first and only medically-proven and guaranteed way to help anyone gain weight fast. Best-selling Author and Physician, David Reuben, M.D., reveals little-known scientific secrets that make putting on pounds fast, safe, and easy for everyone: children and adults, men and women. In his usual easy-to-read style, Dr. Reuben explains how the Magic 13 Minutes, the Opiate Feeding Drive, the Resting Energy Expenditure, and Specific Dynamic Action, can make weight gain fast, easy, and fun.