Tulsi (Expanded) for Immune Function

Research suggests that Tulsi (Ocimum sanctum) possesses immunomodulatory properties, with multiple review articles citing evidence from in vitro, animal, and limited human studies indicating that the plant's bioactive compounds — including eugenol, rosmarinic acid, and ursolic acid — may influence both innate and adaptive immune responses and help regulate inflammation. A 2017 systematic review of 24 human clinical studies found favorable outcomes for immune function among other health domains, while several more recent reviews have explored theoretical applications ranging from post-stroke immune modulation to potential antiviral relevance, though these latter areas remain largely preclinical and speculative. The available evidence base consists predominantly of narrative reviews and animal studies, with relatively few rigorous human clinical trials, and one study in the collection evaluated immune effects in poultry rather than humans, which limits direct translation to human health. Studies indicate that while the overall research direction is consistently supportive, experts across these reviews uniformly call for larger, well-controlled clinical trials to clarify mechanisms, confirm efficacy, and establish appropriate populations and contexts for use.