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  • Writer's pictureBreathe Free Oregon

Half of children in homes where marijuana is smoked by parents showed detectable levels of marijuana

Updated: Mar 9, 2021

In a study among Colorado households where parents used marijuana, 46 percent of the children had detectable levels of the marijuana metabolite COOH-THC, and 11 percent had detectable levels of THC, the primary psychoactive ingredient in marijuana. Even among parents who say they step outside to use marijuana, one third of children in those households tested positive for COOH-THC. "Stepping outside might sound like a good idea, but the evidence we collected suggests that kids are still getting exposed through secondhand or possibly thirdhand smoke exposure."

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