A study released this week from the Journal of the American Medical Association Psychiatry suggests that the harms associated with long-term marijuana use are much less than previously claimed. Time reports: Even after years of heavy use, marijuana doesn’t seem to have much of an impact on the physical health of the body. So finds a recent study published in JAMA Psychiatry, which analyzed data from a group of 1,037 New Zealanders followed from their birth until age 38. The researchers, led by Madeline…

Some of the country’s most prominent physicians have teamed up to launch the nation’s first organization of doctors formed to advocate for the legalization and regulation of cannabis for adult use. Washington Post reports: The group — which is announcing its formation Monday, under the name Doctors for Cannabis Regulation (DFCR) — is endorsing the legalization of marijuana for adult recreational use, a break from the position of the American Medical Association, the largest organization of doctors…

Many marijuana prohibitionists insist one reason to keep marijuana illegal is that it causes mental illnesses, despite many scientific studies that say otherwise. A new study conducted through the Harvard Medical School adds to that body of research and shows that marijuana use is unlikely to be a cause of schizophrenia. The researchers studied four groups: people with no history of psychosis and no history of marijuana use, people with no history of psychosis who were heavy marijuana users as adolescents,…