Arizona dispensaries are required to test cannabis products for potency and contaminants. Testing regulations, implemented in 2020, cover potency and contamination from microbials, heavy metals and ...

Colorado researchers discovered that nearly half of tested cannabis flower products exaggerated their THC levels, while concentrates were mostly accurate. The team’s statewide audit revealed potency ...

Elizabeth and Luke Mason, scientists who met during graduate studies at Colorado State University, saw cannabis legalization in 2012 as an opportunity. With backgrounds in biochemistry, microbiology, ...

California’s cannabis has long been known for being notoriously strong, but test results from the state’s legal stores show that weed in the Golden State is getting weaker. Experts say there’s more to ...