ADHD Biotypes: What the 2026 Brain Study Tells Adults in California

Searches for "ADHD biotypes" went from zero to breakout across California this month after a JAMA Psychiatry study sorted children with ADHD into three brain-based groups. If you read the descriptions and started wondering which one you are, here is what the study found, what it cannot tell you, and why its message about emotional dysregulation matters more for adults than any future scan.