Allegations from anti-marijuana proponents stating that marijuana use causes serious harms are debunked, unwarranted and unproven, says one of the nation’s leading marijuana researchers.
Dr. Igor Grant recently spoke to the American Association for the Advancement of Science (AAAS), and stated about marijuana that there is “ no evidence for long-term damaging effects in adults.”
Over his professional tenure, Dr. Grant has authored multiple peer-review journal articles about the health effects of marijuana, including a report which concluded that long-term and frequent use of marijuana was not associated with the “substantial, systematic, and detrimental effect of cannabis use on neuropsychological performance.”
Dr. Grant also served as the director of the University of California Center for Medicinal Cannabis Research. At that time he oversaw the completion of numerous FDA-approved clinical trials assessing the safety and efficacy of marijuana. In 2012, he co-authored a summary of these trials for the scientific journal Open Neurology. The article stated: “Based on evidence currently available the Schedule I classification is not tenable; it is not accurate that cannabis has no medical value, or that information on safety is lacking.”
Dr. Grant further noted that the present Schedule I classification of the plant is inappropriate and severely hampers researchers from studying its effects.