Half of all lifetime cases of Mental and Substance use disorders begin at age 14; three out of four by age 24.*
The first symptoms typically precede a mental and/or substance use disorder by two to four years, offering a window of opportunity to intervene early and often.

* The National Academics. (2009). Preventing Mental, Emotional, and Behavioral Disorders among Young People Progress and Possibilities. Retrieved September 7, 2012, from, p. 1