Twins study finds no evidence that marijuana lowers IQ in teens

Screen Shot 2016-01-27 at 10.57.32 PM1/18/16–in the first study of its kind, for sale scientists have analyzed long-term marijuana use in teens, comparing IQ changes in twin siblings who either used or abstained from marijuana for 10 years. After taking environmental factors into account, the scientists found no measurable link between marijuana use and lower IQ. Read