The amount of THC in a person’s system after consuming marijuana is not an accurate predictor of impairment, a federally funded study has determined. The research, backed by a grant from the National Institute of Justice (NIJ), involved 20 people who either ate or vaporized cannabis with varying levels of THC. They were then tested … Continue reading Testing People For Marijuana Impairment Based On THC Levels Is ‘Not Reliable,’ Federally Funded Study Finds