Toxins in marijuana smoke may be harmful to health, study finds

CNN Health:

Smoking weed may expose you to the same type of toxic chemicals found in tobacco smoke, a new study finds.People who only smoked marijuana had higher blood and urine levels of several smoke-related toxins such as naphthalene, acrylamide and acrylonitrile than nonsmokers, according to the study published Monday in the journal EClinicalMedicine.

Naphthalene is associated with anemia, liver and neurological damage, while acrylamide and acrylonitrile have been associated with cancer and other health issues.”Marijuana use is on the rise in the United States with a growing number of states legalizing it for medical and nonmedical purposes – including five additional states in the 2020 election,” said senior author Dr. Dana Gabuzda, a principal investigator in cancer immunology and virology at the Dana-Farber Cancer Institute in Boston, in a statement.”The increase has renewed concerns about the potential health effects of marijuana smoke, which is known to contain some of the same toxic combustion products found in tobacco smoke,” Gabuzda said.

Tobacco smokers

The new research presented data from three studies of 245 HIV-positive and HIV-negative participants. Researchers said they chose to study people with HIV infection because of the high prevalence of tobacco and marijuana smoking typically found in this population.

Medical records were compared to blood and urine samples of various chemicals produced by the breakdown of nicotine or the combustion of tobacco or marijuana. Tobacco and tobacco-marijuana smokers had higher levels of naphthalene, acrylamide and acrylonitrile than marijuana-only smokers. Tobacco smokers also had increased levels of a chemical called acrolein in their blood and urine. Acrolein is a known contributor to cardiovascular disease in tobacco smokers.Marijuana smokers, however, did not have higher levels of acrolein in their bodies. “This is the first study to compare exposure to acrolein and other harmful smoke-related chemicals over time in exclusive marijuana smokers and tobacco smokers, and to see if those exposures are related to cardiovascular disease,” Gabuzda said.

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