Teen Marijuana Users Risk Lower IQs

By Peter Lear, LCSW, RYT Researchers in New Zealand have demonstrated that those who begin using marijuana before their 18th birthday risk lower IQs that those who wait until after their 18th birthday. [1] New Zealand ranks as the fifth highest nation in marijuana consumption in the world, behind the United States, whose population has the third highest consumption of marijuana, according to the United Nations.[2] This long-term study gave an IQ test to 1,000 13-year-olds from the same to...
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