The Truth Behind The “Cannabis Harms Teeth” Study


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A new study published in JAMA Psychiatry has found that the continued use of cannabis — even over the course of years or decades — has minimal effects on long-term health.

The Study

The study was conducted by a team of researchers led by Arizona State University’s Madeline H. Meier. It examined the effects of cannabis use among a select group of people over the course of 20 years.

Specifically, the study followed 1,037 New Zealanders for 20 years –from ages 18 to 38– and sought to determine whether there were any measurable changes in their physical health, particularly lung function, body weight, blood sugar, cholesterol levels, dental health, and blood pressure. The study also charted the effects of continued tobacco use.

Cannabis was found to have little to no effect on the body’s health, with the exception of users’ teeth: Cannabis users were found to have poorer periodontal health and were at greater risk of developing gum disease.

The study’s findings for cannabis users did…

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