Marijuana smoke contains higher levels of certain toxins than tobacco smoke

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Marijuana smoke contains higher levels of several toxic compounds including ammonia and hydrogen cyanide than tobacco smoke. Credit: U.S. Drug Enforcement Administration
Marijuana smoke contains higher levels of several toxic compounds, including ammonia and hydrogen cyanide, than tobacco smoke. Credit: U.S. Drug Enforcement Administration

Here’s another reason to “keep off the grass.” Researchers in Canada report that marijuana smoke contains significantly higher levels of several toxic compounds — including ammonia and hydrogen cyanide — than tobacco smoke and may therefore pose similar health risks.


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