Narcissistic personality disorder is believed to affect around 6 percent of people nationwide, but is more prevalent in younger people. Thus, a major National Institute of Health study found that 9.4 percent of Americans in their early twenties experienced episodes of narcissistic personality disorder.

Teen Mental Health
When Does Your Frontal Lobe Fully Develop? How It Affects Teens
Learn when the frontal lobe fully develops, how this affects teen decision-making, emotion regulation, and risk behaviors, and why support during this stage matters.


