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Teen Marijuana Use May Lower IQ

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Teen Marijuana Use May Lower IQ Reported by Drs. Tiffany Chao and  Shari Barnett: Teenagers lighting joints may end up less bright, according to new research  released Monday. In a study of more than 1,000 adolescents in New Zealand, those who began habitually smoking marijuana before age 18 showed an eight-point drop...


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