The PhenX Toolkit released 15 new standardized protocols for measuring medical cannabis and polysubstance use, enabling researchers to compare results across studies for the first time.
Cannabis researchers, epidemiologists, clinical trialists, and public health data scientists
What the researchers found
15 new consensus measurement protocols were developed covering cannabis consumption levels, product types, sources, motives, expectancies, medical card status, provider-patient communication, biochemical validation, and polysubstance use patterns.
Why it matters
Cannabis research has been hampered by every study using different measures — standardized tools mean we can finally combine and compare results across studies to build reliable evidence.
The numbers in context
15 new measurement protocols released in 2025; covers medical cannabis use, product types, motives, biochemical validation, and polysubstance use; freely accessible at phenxtoolkit.org.
How the study worked
Expert consensus process by the PhenX Working Group in 2024, with broader scientific community review, resulting in standardized measurement protocols for the freely accessible PhenX Toolkit.
What this study cannot tell us
Protocols need adoption by researchers to be useful; may not capture all aspects of rapidly evolving cannabis products and markets; US-focused development.
How to read the evidence
Expert consensus protocols from a well-established measurement standardization organization, freely accessible but dependent on researcher adoption.
When this study was published
Published in 2026, with protocols released in 2025, reflecting the current state of cannabis measurement science.
The bigger picture
As cannabis legalization expands, the lack of standardized research measures has been a major barrier to understanding health effects — these protocols could accelerate evidence-based policy.
Questions still open
- How quickly will researchers adopt these standardized measures? Will they be updated as cannabis products continue to diversify?
Common questions
Why do cannabis studies often give conflicting results?
What do the new measurement protocols cover?
Read the original research
Enhancing data compatibility in an evolving landscape: Medical cannabis and polysubstance use protocols in the PhenX Toolkit.
Drug and alcohol dependence, 278, 113001
Citation
Buu, Anne; Thrul, Johannes; Bunting, Amanda; Haegerich, Tamara; Huggins, Wayne; Hopfer, Christian; Vidot, Denise; Ives, Cataia; McNeil, Ryan; Zemore, Sarah; Vilsaint, Corrie; Fallon, Elizabeth; Hill, Christine; Hamilton, Carol; Kelly, John. (2026). Enhancing data compatibility in an evolving landscape: Medical cannabis and polysubstance use protocols in the PhenX Toolkit.. Drug and alcohol dependence, 278, 113001. https://doi.org/10.1016/j.drugalcdep.2025.113001
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