Youth Who Use Cannabis at Early Age More Likely to Have Health Problems as Adults

McGill study finds youth using cannabis young face higher long-term health risks.

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Youth who start using marijuana before the age of 15 have more physical and psychological problems into early adulthood, according to a study by McGill University researchers.

The study used data from the Quebec Longitudinal Study of Child Development, with researchers looking at cannabis use in 1,591 youth between 12 and 17 years old, as well as health care records up to age 23.