https://media1.s-nbcnews.com/j/newscms/2019_03/2702691/190103-medical-marijuana-cs-1012a_0c56dcb9639c3249bec1112b561ca32a.nbcnews-fp-1200-630.jpg

even a little marijuana may change teen brain, study finds

The study, which looked at the brains of 46 14-year-old girls and boys from Ireland, England, France and Germany, found that teenagers who reported using recreational marijuana just once or twice displayed increased volume on MRI images in numerous brain regions involved in emotion-related..

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