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Marijuana lab testing accuracy improving, study in new science journal finds

Marijuana testing labs’ ability to detect pesticides on plant material improved over the course of a four-year study.

The study, shared exclusively with MJBizDaily and reMind in conjunction with the launch of the Cannabis and Psychedelic Science Journal (CAPS Journal), analyzed nearly 350 pesticide test results collected from accredited testing labs between 2019 and 2023.


The number of tests found to accurately measure pyrethrin and pyrethroid compounds – common insecticides that are part of some states’ mandated third-party marijuana testing regimen – improved from 89% in spring 2019 to an overall average of 94% across all eight data points.

“The ability of ATLs (analytical testing laboratories) in the cannabis industry to detect and quantify pesticides has improved over a four-year period,” according to

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