Contrary to popular belief, ADHD is underdiagnosed, not overdiagnosed, particularly in adults. Research shows that many individuals, especially women and those with predominantly inattentive symptoms, go undiagnosed into adulthood. According to NHS statistics, around 3-4% of adults in the UK are estimated to have ADHD, but only a fraction have been formally diagnosed and treated. Many adults are only diagnosed after years of struggling with work, relationships, and mental health.