Marijuana with ‘CBD’ May Pose Less Risk to Long-Term Users

Marijuana with relatively high levels of a compound called cannabidiol may be less risky to smoke over the long term, because this ingredient may counteract some of the drug’s harmful effects, according to a new study in mice.The study found that adolescent mice injected with frequent doses of tetrahydrocannabinol (THC) — the ingredient in marijuana that produces a “high” — showed signs of impaired memory and increased anxiety over the long term.

But mice that received daily doses of THC combined with an equal amount of cannabidiol (CBD) did not experience these negative effects.The study “suggests that strains of cannabis with similar levels of CBD and THC would pose significantly less long-term risk due to CBD’s protective effect against THC,” study author Dr. Ken Mackie, a professor in the Department of Psychological and Brain Sciences at Indiana University, said in a statement.

Over the last several decades, THC levels in marijuana used in the United States have increased 300 percent, while levels of CBD in marijuana have decreased, the researchers said. But the long-term effects of exposure to THC and CBD need to be studied further, they said.

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Source: Marijuana with ‘CBD’ May Pose Less Risk to Long-Term Users

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