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Nootropics>Botanical & herbal supplements>Rosemary
Botanical & herbal supplements

Rosemary

Salvia rosmarinus / Rosmarinus officinalis leaf and extract

Rosemary is an aromatic herb with preliminary, preparation-specific human cognition evidence. Leaf powder, rosemary drinks and concentrated extracts are different products. Offers named Ursolic Acid (Rosemary Leaf Extract) should not be assumed to match the leaf powder or beverages used in cognition trials. Compare the actual ingredient specification before dose or price.

Memory SupportWhole HerbStandardized ExtractFood DerivedTraditional UseLimited Human EvidenceMixed Evidence
Updated October 2026/7 min read/9 citations
Reviewed by the NootropicsIndex editorial team.Method: prioritize cited human research and official safety or regulatory sources; compare retailer-listed prices without endorsing products.Affiliate disclosure
01

What is it?

What rosemary products usually mean

2

Rosemary leaf powder, tea and water-based drinks differ from concentrated extracts and essential oils. This page separates their research contexts. A label mentioning rosemary does not make all preparations interchangeable.

Ursolic-acid offers need a different comparison9
The displayed merchant powder label identifies 45 mg ursolic acid from rosemary leaf-and-stem extract per 300 mg serving. That is a declared 15% constituent fraction, not pure ursolic acid or ordinary leaf powder. The merchant text gives a different serving size, so confirm the current label before buying. This extract has not been shown equivalent to the leaf or beverage preparations in the cognition studies.

Names, aliases and forms

7

Rosmarinus officinalis is the name used in older trials and the EMA leaf monograph; Salvia rosmarinus is used in newer research. The medicinal plant part covered by the monograph is the dried leaf.

Small human cognition signals4
An 80-adult trial of a specific rosemary water found small effects on some cognitive tests. A newer 48-adult drink study reported alertness and contentedness changes, with task effects depending on individual blink measures. Neither establishes everyday productivity benefits or equivalence to extract capsules.
Dose response is not automatically linear1
In the older-adult dried-leaf study, 750 mg improved speed of memory compared with placebo, while 6000 mg impaired performance. This makes high-dose marketing especially important to check carefully.
02

Names, aliases and forms

Common NameRosemary
Scientific NameSalvia rosmarinus
Taxonomic SynonymRosmarinus officinalis
Plant PartRosemary leaf
Extract NamesRosemary extract; Rosemary water
Marker CompoundsRosmarinic acid; Carnosic acid
03

Mechanisms of action

Mechanisms are plausible, not settled

2

Rosemary contains phenolic acids, diterpenes and volatile constituents. Human studies discuss cholinergic, cerebrovascular and metabolic explanations, but these mechanisms do not prove a reliable cognitive effect for every commercial form.

Animal findings have limited human relevance

5

Animal cognition studies help explain research interest in rosemary, but do not establish cognitive benefits in humans.

04

Potential effects and evidence map

Small human studies report some acute task-performance signals from dried leaf powder or specific rosemary beverages. Results vary by dose, preparation and outcome; high-dose leaf powder impaired memory speed in one trial. Brain-activity changes alone do not demonstrate better everyday cognition. These findings do not establish efficacy for ursolic-acid-focused products or a reliable long-term nootropic regimen.

Effect domainMagnitudeGrade
Memory / learning1
AcuteConfidence: Low

Small human studies suggest possible short-term memory or task-performance signals, but effects are not robust enough for broad memory claims.

Note Dose and form matter: the older-adult dried-leaf study reported a low-dose benefit and high-dose impairment.

2/5
C
Focus / attention2
AcuteConfidence: Low

Rosemary water and rosemary-containing drink studies report small acute attention or task-performance signals in healthy adults.

Note Evidence is preparation-specific and should not be generalized to every capsule, tea or aroma product.

2/5
C
Mental energy / wakefulness4
AcuteConfidence: Low

One newer drink study reported post-task alertness and contentedness changes, but this remains preliminary.

Note These acute mood and alertness findings do not establish sustained daily energy benefits.

1/5
D
Mood / wellbeing4
AcuteConfidence: Low

Mood findings are early and product-specific, with insufficient evidence for general wellbeing claims.

Note Results from one specific drink do not establish benefits for other rosemary preparations.

1/5
D
05

Typical dosages and timing

dried leaf study1750 mg to 6 g

These were single experimental doses in 28 older adults, not a daily regimen. The lowest dose improved memory speed; the highest impaired it, and some other task outcomes worsened less consistently. There is no established general nootropic dose or extract conversion.

Specific rosemary water2250 mL

Eighty healthy adults received a particular rosemary extract-and-hydrolat drink or plain water. Hydrolat is the water collected during plant distillation. A beverage volume cannot be converted into milligrams of leaf powder or concentrated extract without composition data.

06

Timing & effect horizon

Effect horizonAcute
Acute
Acute studies are assessment windows1

Cognitive testing occurred 1, 2.5, 4 and 6 hours after dosing in the leaf trial. This is an observation window, not a demonstrated onset or duration of benefit. Reliable whole-rosemary The time for blood levels to fall by half during the final elimination phase.Source, cycle length and sustained benefit are not established by these sources.

07

Safety, side effects and risk profile

Risk depends on the preparation6
The minimal base rating is limited to ordinary culinary-like oral leaf exposure in generally healthy adults. It does not apply to essential oils, concentrated ursolic-acid products, high doses or prolonged supplement routines. The sources do not establish common clinically meaningful harm at culinary exposure; targeted allergy and medical-condition cautions remain relevant.
High-dose and chronic-use uncertainty6
The safety review highlights uncertainty around chronic and high-dose exposure. Much toxicology is preclinical, so it does not establish a human hazard at culinary intake. Concentrated extracts require their own composition and safety assessment.
Pregnancy / lactation caution7
Confidence: Medium

Pregnancy and lactation use is not recommended in the EU rosemary leaf monograph because safety is not established.

Note This caution is stronger than ordinary culinary seasoning context and applies to formal herbal-product or supplement-style use.

1/5
C
Liver / kidney caution7
Confidence: Medium

Rosemary leaf monograph cautions against self-directed oral use with bile-duct obstruction, gallbladder inflammation, gallstones or liver disease.

Note The risk row is a use-context caution, not evidence that typical culinary intake injures the liver.

2/5
C
Evidence uncertainty6
Confidence: Medium

Long-term, high-dose and concentrated extract safety is less certain than culinary seasoning use.

Note Safety review emphasizes realistic exposure and chronic/high-dose uncertainty.

2/5
C
allergy-type issue7

The EMA leaf monograph reports hypersensitivity, including contact dermatitis, with unknown frequency. Known rosemary allergy is a reason to avoid rosemary leaf products.

expert review first7

EMA advises against medicinal rosemary leaf use during pregnancy, breastfeeding and in children under 12. Oral leaf products are contraindicated with bile-duct obstruction, gallbladder inflammation, gallstones or liver disease. These are specific restrictions, not evidence of liver injury from ordinary seasoning.

08

Interactions and cautions

Interaction evidence is limited7

The EMA assessment describes no reported medicinal interactions for rosemary leaf. That does not establish that every concentrated extract is interaction-free; medication users need product-specific review.

09

Legal and regulatory status

food ingredient context8

As of 15 October 2026, the US FDA food inventory lists rosemary oleoresin as a flavoring agent or adjuvant under 21 CFR 182.20. This food-use entry is not an assessment of cognitive efficacy or blanket authorization for every supplement formulation.

traditional use only7

As of 15 October 2026, the EMA/HMPC leaf monograph concerns traditional herbal medicines for specified non-cognitive uses. It does not establish a cognitive benefit or automatically authorize food supplements. Product requirements vary by national authority and category; these EU and US contexts are not global rules.

10

Practical buying and quality notes

  • Compare prices only within the same preparation and disclosed strength. Price per gram of an ursolic-acid-focused extract is not price per gram of dried leaf, and a capsule price needs a known amount per capsule. Include pack size, shipping and applicable discounts when comparing the final cost.
  • An extract ratio describes input plant material relative to extract; standardization describes a specified constituent concentration. Neither proves clinical potency. Ask for the actual constituent specification and a batch-specific certificate of analysis with identity and contaminant testing.
  • Aroma exposure and oral leaf or beverage intake use different routes. Match the product to the preparation and route in its cited study rather than transferring findings between them.2
11

FAQ

Is rosemary a proven nootropic?

2

Not proven in a broad sense. Small human studies make rosemary worth tracking, but current evidence is too form-specific and preliminary for strong memory, focus or productivity claims.

Is there an established rosemary nootropic dose?

1

No general regimen is established. The leaf trial used single experimental doses and found that more was not better. It cannot define a dose for concentrated extracts or ursolic-acid products.

What should buyers compare first?

1

Check the exact preparation, extract specification and amount per serving before comparing prices. For an ursolic-acid-labeled product, ask for its constituent content rather than assuming the amount represents ordinary rosemary leaf.

12

References

  1. Pengelly A, Snow J, Mills SY, Scholey A, Wesnes K, Butler LR. Short-term study on the effects of rosemary on cognitive function in an elderly population. J Med Food. 2012;15(1):10-17.
  2. Moss M, Smith E, Milner M, McCready J. Acute ingestion of rosemary water: Evidence of cognitive and cerebrovascular effects in healthy adults. J Psychopharmacol. 2018;32(12):1319-1329.
  3. Muduroglu-Kirmizibekmez A, Cati C, Onder A, Aydin S, Kara I. Investigation of the acute impact of rosemary consumption on brain activity in healthy volunteers. Nutr Neurosci. 2025;28(3):321-332.
  4. Riby LM, Kardzhieva D, Fenwick S, Fowler S, Moss M. The Impact of a Rosemary Containing Drink on Cognition and Mood: The Role of Eye Blink Dynamics. NeuroSci. 2026;7(1):15.
  5. Hussain SM, Syeda AF, Alshammari M, et al. Cognition enhancing effect of rosemary (Rosmarinus officinalis L.) in lab animal studies: a systematic review and meta-analysis. Braz J Med Biol Res. 2022;55:e11593.
  6. Ghasemzadeh Rahbardar M, Hosseinzadeh H. Toxicity and safety of rosemary (Rosmarinus officinalis): a comprehensive review. Naunyn Schmiedebergs Arch Pharmacol. 2025;398(1):9-23.
  7. European Medicines Agency, Committee on Herbal Medicinal Products. European Union herbal monograph on Rosmarinus officinalis L., folium, Revision 1. EMA/HMPC/513940/2021. Adopted 29 May 2024.
  8. US Food and Drug Administration. Substances Added to Food: Rosemary, oleoresin.
  9. BulkSupplements. Ursolic Acid (Rosemary Leaf Extract) powder label, 250 g. Checked 15 October 2026.
Note

This page is informational and summarizes available evidence. It is not medical advice, a recommendation, or a substitute for guidance from a qualified clinician.