Last month, I attended the 2018 International Conference on ADHD, and one of our keynote speakers presented some startling statistics. Doctor Russell Barkley, the leading researcher on ADHD, and his colleagues recently conducted a study that showed that ADHD reduces one’s life expectancy by 13 years, and if the DBH Taq1 gene or the DAT1 gene is present, it is a 20-year drop in life expectancy. These numbers should startle you. This is a greater reduction in life expectancy than there is for smoking, excessive alcohol use, obesity, and coronary heart disease.