Lab study ranks cannabinoids by anti-inflammatory potency in human immune cells, with THC most active and terpenes showing minimal effects

What the researchers found

Of 21 immune parameters tested, THC affected 11, followed by cannabidivarin (CBDV), cannabigerol (CBG), cannabichromene (CBC), cannabinol (CBN), and CBD with the fewest effects. Among terpenes, alpha-pinene showed the most activity, linalool and phytol had modest effects, and limonene had no detectable immune activity at all.

Why it matters

This study directly compares the immune effects of multiple cannabis compounds side by side in human cells, providing data to evaluate popular claims about terpenes and minor cannabinoids.

The numbers in context

6 cannabinoids and 5 terpenes tested across 21 immune parameters. THC affected 11 parameters. Limonene affected 0 parameters. Concentrations ranged from 0.001 to 10 μM.

How the study worked

Human peripheral blood mononuclear cells (PBMCs) were pretreated with individual cannabinoids or terpenes at 0.001-10 μM concentrations, then stimulated to activate dendritic cells, monocytes, or T cells. Proliferation, activation markers, cytokine production, and phagocytosis were measured.

What this study cannot tell us

In vitro study using isolated immune cells, not whole organisms. Single-compound testing does not capture potential synergistic or entourage effects. Concentrations may not reflect physiologically achieved levels. Only anti-inflammatory properties tested.

How to read the evidence

Rigorous in vitro methodology with human cells, but results may not translate directly to whole-body effects.

When this study was published

Published in 2022.

The bigger picture

The finding that commonly promoted terpenes like limonene showed no measurable immune activity challenges marketing claims about terpene profiles driving cannabis effects, while lesser-known cannabinoids like CBDV showed surprising potency.

Questions still open

• Would these compounds behave differently in combination (entourage effect)? Are the concentrations tested achievable through normal cannabis use? Could CBDV be developed as an anti-inflammatory therapeutic?

Common questions

Read the original research

Evaluation of the anti-inflammatory effects of selected cannabinoids and terpenes from Cannabis Sativa employing human primary leukocytes.

Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 170, 113458

Citation

Blevins, Lance K; Bach, Anthony P; Crawford, Robert B; Zhou, Jiajun; Henriquez, Joseph E; Rizzo, Michael D; Sermet, Sera; Khan, D M Isha Olive; Turner, Helen; Small-Howard, Andrea L; Kaminski, Norbert E. (2022). Evaluation of the anti-inflammatory effects of selected cannabinoids and terpenes from Cannabis Sativa employing human primary leukocytes.. Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 170, 113458. https://doi.org/10.1016/j.fct.2022.113458

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