In people with anxiety, baseline inflammatory status shaped how different cannabis chemovars affected mood and sleep, with CBD-dominant products showing the most consistent improvements.
People with anxiety exploring cannabis as a treatment option and researchers studying personalized cannabis medicine.
CBD chemovars produced more consistent improvements regardless of inflammatory state
What the researchers found
While cannabis use did not change cytokine concentrations over four weeks, baseline inflammation moderated outcomes. People with higher baseline inflammation responded differently to different cannabis chemovars. CBD-dominant products produced more consistent improvements in negative affect and sleep quality, while THC-associated improvements varied depending on the person's inflammatory state.
Why it matters
This is among the first studies to show that a person's inflammatory profile may predict whether cannabis will help their anxiety and sleep. It suggests a possible biological reason why cannabis works for some people with anxiety but not others.
The numbers in context
147 participants across three cannabis chemovars, 24 controls. No group-dependent changes in cytokines (p=0.12). Baseline inflammation moderated DASS-21 outcomes (p<0.05) and sleep quality (p=0.04). CBD chemovars showed more consistent improvements.
How the study worked
Participants with mild or greater anxiety (n=147) were assigned to one of three cannabis chemovars (THC+CBD, THC-only, CBD-only) for 4 weeks of ad libitum use and compared to an anxiety control group (n=24). Depression, anxiety, stress (DASS-21), sleep quality (PSQI), and plasma cytokines were measured at baseline and week 4.
What this study cannot tell us
Non-randomized assignment to chemovars. Ad libitum use means dosing varied. Small control group (24). Four-week follow-up may be too short for stable effects. Cannot determine optimal THC:CBD ratios from this design.
How to read the evidence
Preliminary: non-randomized design with small control group and ad libitum dosing, though novel biomarker approach.
When this study was published
2025 study.
The bigger picture
Personalized medicine approaches to cannabis are in their infancy. This study suggests that measuring inflammation could eventually help predict who will benefit from cannabis for anxiety and which chemovar to recommend.
Questions still open
- Could a simple blood test for inflammation help guide cannabis chemovar selection? What specific inflammatory markers are most predictive? Would longer-term use show different results?
Common questions
Did cannabis reduce inflammation?
Which type of cannabis worked best for anxiety?
Read the original research
Inflammatory state moderates response to cannabis on negative affect and sleep quality in individuals with anxiety.
Frontiers in behavioral neuroscience, 19, 1549311
Citation
Lisano, Jonathon K; Skrzynski, Carillon J; Giordano, Gregory; Bryan, Angela D; Bidwell, L Cinnamon. (2025). Inflammatory state moderates response to cannabis on negative affect and sleep quality in individuals with anxiety.. Frontiers in behavioral neuroscience, 19, 1549311. https://doi.org/10.3389/fnbeh.2025.1549311
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