What is rosemary leaf used for?

Rosemary leaf (Rosmarinus officinalis) is used as a culinary herb and traditionally for memory support, digestion, and general wellness. Modern research focuses mainly on rosemary extracts and teas.

Does rosemary leaf help with memory and cognition?

Some evidence suggests rosemary preparations may support aspects of cognitive performance and memory, particularly in older adults. Effects can vary by dose, preparation, and individual response.

What are the main active compounds in rosemary leaf?

Key compounds include polyphenols such as carnosic acid and rosmarinic acid. These are associated with antioxidant and anti-inflammatory activity in preclinical research.

What is a typical rosemary leaf extract dosage?

Common supplemental ranges are about 250–500 mg per day of rosemary leaf extract, depending on product strength and standardization. Follow the label and consider medical advice if you have conditions or take medications.

Is rosemary leaf safe, and are there side effects?

Rosemary used in food amounts is generally well tolerated. Concentrated supplements may cause gastrointestinal upset in some people and may not be appropriate during pregnancy or with certain medications without clinician guidance.

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Rosemary leaf

Mixed study results·5/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Rosemary leaf is an herb traditionally used for memory, digestion, and as an antioxidant, with emerging evidence supporting cognitive and anti-inflammatory benefits.

Longevity Digestion & Gut Health Anti-inflammatory Cognitive Enhancement Memory Improvement Antioxidant

dose range

250–500 mg

1-2 divided doses daily

Consumption

Take with or without food; teas use 2-4 g dried leaf per day.

Not fat-soluble.

Best time

Can be taken any time of day based on preference.

Description

Rosemary (Rosmarinus officinalis) is a culinary and medicinal herb used in traditional medicine for centuries. Modern research has investigated its potential effects on cognition, inflammation, and gut health, with the majority of evidence based on rosemary extract or tea preparations.

benefits

Main effects with level of evidence

Mixed

Note on evidence

Evidence from animal and small-scale human trials suggests mild cognitive and anti-inflammatory benefits, but large randomized controlled trials are lacking.

Supports Cognitive Function and Memory

Mixed

Rosemary leaf extract may improve memory and cognitive performance, especially in older adults, potentially due to antioxidant and neuroprotective effects.

Particularly relevant for: older adults · students

pmid30104929 · PubMed Review: Effects of Rosmarinus officinalis L. (rosemary) on cognition, mood, and anxiety pmid23652642 · PubMed: Rosemary and cognitive performance in healthy adults

Antioxidant and Anti-inflammatory Effects

Moderate

Rosemary contains polyphenols (carnosic acid and rosmarinic acid) that have demonstrated antioxidant and anti-inflammatory activity in laboratory and animal studies.

Particularly relevant for: adults

pmid25014391 · PubMed: Antimicrobial and antioxidant activities of rosemary efsa2010 · EFSA ROSMARINUS OFFICINALIS safety review

May Support Digestion

Limited

Traditionally used to alleviate mild digestive complaints, rosemary may help with dyspepsia and has antibacterial properties supportive of gut health.

Particularly relevant for: adults

ods003 · NIH Office of Dietary Supplements - Rosemary examine_rosemary · Examine.com - Rosemary supplementation

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Generally well tolerated at typical supplemental doses, but high doses may cause serious adverse effects in sensitive individuals or at-risk populations.

warning notices

Gastrointestinal upset and allergic reactions may rarely occur.
High intakes can potentially trigger seizures in predisposed individuals.
Potential to interact with blood thinners and blood pressure medications.
Avoid high-dose supplementation if you are pregnant or breastfeeding due to insufficient safety data.
Use only with clinician supervision if you have epilepsy or seizure disorders, as rosemary may lower seizure threshold.
Monitor blood pressure if used with antihypertensive drugs, as rosemary may have additive effects.
Discontinue at least 2 weeks before surgery due to possible effects on blood clotting.

Known interactions with medications