Youths who used cannabis before age 18 were nearly 40% more likely to develop depression, 50% more likely to have suicidal thoughts and more than three times as likely to attempt suicide in young adulthood compared with those who didn't use cannabis, according to a systematic review in JAMA Psychiatry. No significant association was found between cannabis use in adolescence and later risk of anxiety.
Review ties teen cannabis use to depression risk later in life
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