This statistic is as familiar as it is startling. According to the National Comorbidity Survey-Replication (NCS-R), the peak age of onset for any disease involving mental health is 14 years. True for bipolar disorder. True for anxiety. True for schizophrenia and substance abuse and eating disorders. The data suggest that most mental health challenges emerge during adolescence. If true, this brings to mind an important developmental question:
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