Thyme for Immune Function

Research suggests that thyme, often studied in combination with other herbs, probiotics, or phenolic compounds, may play a role in supporting immune function, though the evidence is limited and mixed. The available studies include animal research showing that thyme meal combined with a probiotic improved immune markers like IgA and IgG in heat-stressed rabbits, and a small randomized controlled trial in humans suggesting that olive oil enriched with both olive and thyme phenolics did not produce significant changes in intestinal immune or inflammation markers, while a higher-dose olive-only phenolic oil showed some immune-stimulating signals. A second randomized controlled trial found that a multi-herb essential oil blend containing thyme showed possible benefits for gut development in young calves but no clear differences in immune cell activity. Notably, two of the five relevant studies involved no thyme at all and are not directly applicable, the human trial enrolled only ten participants, and all findings come from animal models or small preliminary human studies, meaning no strong conclusions about thyme's effect on immune function in healthy humans can yet be drawn from this body of evidence.