Mature women smoking weedUploader: Brecken 18 days ago Subscribe 698
In another recent study on twins, those who used marijuana showed a significant decline in general knowledge and in verbal ability equivalent to 4 IQ points between the preteen years and early adulthood, but no predictable difference was found between twins when one used marijuana and the other didn't. Compared to those who don't use marijuana, those who frequently use large amounts report the following: High School and Youth Trends. Science Highlight Stopping marijuana use improves memory. While it's possible to fail a drug test after inhaling secondhand marijuana smoke, it's unlikely. However, study findings have been mixed.