Marijuana may be even safer than previously thought, researchers say

Compared with other recreational drugs — including alcohol — marijuana may be even safer than previously thought. And researchers may be systematically underestimating risks associated with alcohol use.

Those are the top-line findings of recent research published in the journal Scientific Reports, a subsidiary of Nature. Researchers sought to quantify the risk of death associated with the use of a variety of commonly used substances. They found that at the level of individual use, alcohol was the deadliest substance, followed by heroin and cocaine.