Holy Basil (Tulsi) for Immune Function

Research on Holy Basil (Tulsi) and immune function is quite limited in the available evidence base, and neither of the linked studies directly examines immune effects in humans. One preclinical aquaculture study found that nanoparticles derived from tulsi and other medicinal plants were associated with improved immune markers and disease resistance in shrimp, though findings in non-human animal models cannot be applied to human health outcomes. The other study, a regulatory analysis, raises concerns about how Ayurvedic supplements including tulsi-containing products are marketed, noting that many online product listings make unsupported or illegal disease claims that may mislead consumers. Overall, the current evidence does not include human clinical trials, randomized controlled trials, or meta-analyses specifically evaluating Holy Basil for immune function, and readers should be cautious about marketing claims that outpace the available science.