Rosemary
Salvia rosmarinus
also known as Rosmarinus officinalis, Dew of the sea
Moderate
A Mediterranean culinary herb with traditional use for memory support, circulation, and topical hair care.
- May support cognitive function and memory
- Antioxidant rosmarinic acid
- Topical use for hair growth (small evidence)
- Mild circulatory stimulant
- Antimicrobial action of essential oil
- Used by ancient Greeks as a memory tonic
Active in Rosmarinic acid, Carnosic acid, Camphor, 1,8-cineole.
Avoid medicinal doses in pregnancy — uterine stimulant
Use caution with blood thinners
Use caution with diabetes medication
Always dilute essential oil
May cause seizures at very high doses
Related literature · not reviewed for these claims
These papers were imported by topic. They may concern plants, laboratory work, or different preparations. Inclusion here does not establish a human health benefit or support the claims above. How to read our sources →
- Chitosan-induced modulation of secondary metabolism and stress tolerance in Salvia rosmarinus under combined drought and heat stress.
- Spectroscopic analysis reveals an opposite pattern between carnosic and rosmarinic acid concentrations in rosemary (Salvia rosmarinus).
- Medicinal plants in the management of muscle loss and sarcopenia: A narrative review of preclinical and clinical evidence from eight species.
- Transcriptional and functional characterization of terpene synthase genes of the aromatic plant Plectranthus hadiensis.
- Postharvest delivery of Bacillus G36 metabolites formulated in AgNP modifies Salvia rosmarinus Spenn. bioactive profiles.
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Common questions
There's a long tradition behind it. The ancient Greeks used rosemary specifically as a memory tonic, and modern research on cognitive function is supportive, though it's better described as promising than conclusive.
There's small but real evidence supporting topical rosemary oil for hair growth, which is why it shows up so often in hair-care products now.
Skip medicinal doses. Rosemary can act as a uterine stimulant at those amounts. Using rosemary as a cooking herb in normal food amounts is a different story and not a concern.
No, always dilute it first. Undiluted essential oil is too concentrated for direct skin application.