Rosemary Extract
Research reviewed: Up until 03/2026
Rosemary Extract (Rosmarinus officinalis / Salvia rosmarinus) is a dietary supplement with 5 published peer-reviewed studies involving 166 participants, researched for Cognitive Function & Antioxidant, Antioxidant & Skin Health.
Evidence at a Glance
Strength is scored by study design, sample size, study type, and outcomes
Cognitive Function & Antioxidant
ModerateAntioxidant & Skin Health
ModerateResearch Visualised
Visual breakdown of the clinical data.
Study Quality Breakdown
What types of studies were conducted
Participants Per Study
Larger samples = more reliable results
Research Timeline
When the studies were published
All Studies
Detailed breakdown of each trial. Click to expand.
Cognitive Function & Antioxidant
To assess rosemary aroma/supplementation on cognitive performance and mood.
Study Type
Randomised, double-blind, placebo-controlled
Purpose
To assess rosemary aroma/supplementation on cognitive performance and mood.
Dose
Rosemary aroma exposure or 750-6000mg rosemary capsule
Participants
66 healthy adults
Duration
Single dose / crossover
Results
Rosemary exposure significantly improved working memory speed and accuracy. Enhanced alertness. 1,8-cineole in rosemary aroma associated with cognitive performance improvements.
How They Measured It
Computerised cognitive battery, mood VAS, alertness, working memory
To compare rosemary oil vs minoxidil for hair loss treatment (androgenetic alopecia).
Study Type
Randomised controlled trial
Purpose
To compare rosemary oil vs minoxidil for hair loss treatment (androgenetic alopecia).
Dose
2% rosemary oil topical application vs 2% minoxidil twice daily
Participants
100 patients with androgenetic alopecia
Duration
6 months
Results
Rosemary oil produced similar hair count increase to minoxidil at 6 months. Less scalp itching vs minoxidil. Rosemary oil significantly effective and comparable to standard treatment.
How They Measured It
Hair count (phototrichogram), patient satisfaction, scalp condition
Antioxidant & Skin Health
To evaluate the effects of topical rosemary (Rosmarinus officinalis) supplementation combined with aesthetic radiofrequency on oxidative stress in women.
Study Type
Randomized, Double-Blind, Placebo-Controlled
Purpose
To evaluate the effects of topical rosemary (Rosmarinus officinalis) supplementation combined with aesthetic radiofrequency on oxidative stress in women.
Dose
Rosmarinus officinalis supplementation combined with radiofrequency treatment
Participants
Women undergoing aesthetic treatment
Duration
8 weeks
Results
Rosmarinus officinalis supplementation combined with radiofrequency was safe and significantly reduced oxidative stress markers compared to radiofrequency alone.
How They Measured It
Oxidative stress markers (MDA, SOD, catalase), safety assessment
To evaluate the photoprotective and anti-aging benefits of a combination of rosemary and grapefruit extracts in humans.
Study Type
Randomized Controlled Trial
Purpose
To evaluate the photoprotective and anti-aging benefits of a combination of rosemary and grapefruit extracts in humans.
Dose
Oral rosemary and grapefruit extract combination supplement
Participants
Adults with skin aging concerns
Duration
12 weeks
Results
Rosemary and grapefruit extract combination improved skin photoprotection and reduced markers of skin aging including improvements in skin elasticity and hydration.
How They Measured It
Skin photoprotection parameters, anti-aging biomarkers, collagen assessment
To evaluate the effects of lavender and rosemary extracts on sore throat and hoarseness after endotracheal intubation.
Study Type
Randomized Controlled Trial
Purpose
To evaluate the effects of lavender and rosemary extracts on sore throat and hoarseness after endotracheal intubation.
Dose
Lavender and rosemary extract combination
Participants
Patients undergoing percutaneous nephrolithotomy
Duration
48 hours post-surgery
Results
Lavender and rosemary extract combination significantly reduced post-intubation sore throat and hoarseness compared to control.
How They Measured It
Visual analogue scale for throat pain, hoarseness scores, patient comfort
Frequently Asked Questions
Common questions about Rosemary Extract research
There are currently 5 peer-reviewed studies on Rosemary Extract (Rosmarinus officinalis / Salvia rosmarinus), involving 166 total participants. Research covers Cognitive function, Antioxidant protection, Hair health and 1 more areas. The overall evidence strength is rated as Strong.
The evidence is currently rated as "Strong Evidence". This rating is based on study design quality (randomisation, blinding, placebo controls), sample sizes, study types (5 human studies), and reported outcomes.
Rosemary Extract has been researched for: Cognitive function, Antioxidant protection, Hair health, Cardiovascular health. Each area has its own body of evidence which you can explore in the study breakdowns above.
Yes, 5 out of 5 studies are human trials. Human trials carry more weight in our evidence scoring system.
