Among 252 legal cannabis users, dabbing produced the highest plasma THC and strongest subjective effects compared to vaping, bongs, and joints, but intoxication from dabbing and vaping dropped off more quickly.
Cannabis researchers, harm reduction specialists, impairment policy experts
Dabbing produced the highest plasma THC and subjective intoxication but with faster decline than flower methods
What the researchers found
Dabbing was associated with higher plasma THC concentrations and subjective effects than flower-based methods (bong, joint); dabbing and vaping showed more rapid reductions in subjective intoxication over time.
Why it matters
As dabbing and vaping gain popularity, understanding that these methods produce higher peak THC exposure but shorter subjective duration has implications for dosing, impairment assessment, and use patterns.
The numbers in context
252 participants; 46.4% female; four administration modes compared; dabbing produced highest plasma THC and subjective effects; dabbing and vaping showed faster decline in subjective intoxication.
How the study worked
Secondary analysis of two quasi-experimental studies; 252 participants (46.4% female) self-administered legal market cannabis products via their preferred mode (dabbing, vaping, bong-like, joint-like); plasma THC and subjective effects measured.
What this study cannot tell us
Naturalistic design means products varied in potency; no random assignment to modes; participants used their preferred mode (selection bias); could not control for tolerance differences; secondary analysis.
How to read the evidence
Large sample with objective plasma measurements using legal market products, but quasi-experimental design and self-selected modes limit causal conclusions.
When this study was published
Published 2025
The bigger picture
The cannabis landscape has shifted from flower-dominant to diverse high-potency products, and research needs to account for how different administration methods fundamentally change the THC exposure profile.
Questions still open
- Does the faster decline in dabbing/vaping intoxication lead to more frequent re-dosing? How should impairment testing account for mode-specific THC kinetics?
Common questions
Which method of using cannabis produces the strongest effects?
Do effects last as long with different methods?
Read the original research
Mode matters: exploring how modes of cannabis administration affect THC plasma concentrations and subjective effects.
Journal of cannabis research, 7(1), 28
Citation
Chen, Margy Y; Brooks-Russell, Ashley; Bryan, Angela D; Bidwell, L Cinnamon. (2025). Mode matters: exploring how modes of cannabis administration affect THC plasma concentrations and subjective effects.. Journal of cannabis research, 7(1), 28. https://doi.org/10.1186/s42238-025-00282-y
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