Research suggests that rosemary may have some influence on local blood flow through its effects on adrenergic receptors, based on one laboratory study using guinea pig smooth muscle tissue, which found that rosemary oil appeared to interact with alpha-2 adrenergic receptors in ways the researchers linked to potential improvements in local circulation and pain relief. However, this finding comes solely from an in vitro animal tissue study and has not been confirmed in human trials or living organisms, making it difficult to draw firm conclusions about rosemary's effects on blood circulation in people. The remaining studies in this set examined rosemary in entirely different contexts — oral cancer cell behavior and oxidative stress, early immune responses to SARS-CoV-2, and parasitic genetic diversity — and do not bear on circulation. Overall, the evidence specific to rosemary and blood circulation is very limited and preliminary, and considerably more research, including human studies, would be needed before any reliable conclusions could be drawn.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| Reduction of oral pathogens and oxidative damage in the CAL 27 cell line by R... | Other | 2023 | Neutral | 100 |
| Investigations into the specific effects of rosemary oil at the receptor level. | Other | 2010 | Supports | 95 |
| Large clones of pre-existing T cells drive early immunity against SARS-COV-2 ... | Other | 2022 | Neutral | 85 |
| Molecular Characterization and Phylogenetic analysis of<i>Wuchereria bancroft... | Other | 2019 | Neutral | 80 |