Effects of Rosemary Essential Oil on Human Cognition (Rosmarinus)
28 april 2026 bijgewerkt door: Heloisa de Freitas Pacífico, Federal University of Paraíba
The Use of Rosmarinus Officinalis L. Essential Oil (Camphor and Cineol Chemotypes) in Cognition: a Randomized, Double-blind, Placebo-controlled Study
Aromatherapy is one of the complementary therapies that is carried out through essential oils.
The essential oil of Rosmarinus Officinalis L. (rosemary) has been gaining attention in aromatherapy research, as studies have shown that the use of this oil is one of the promising non-pharmacological therapies for cognition.
In this way, inhalation of rosemary essential oil is one of the forms of cognitive intervention across different age groups.
The study will aim to analyze the effect of rosemary essential oil, with the following chemotypes: camphor and cineole, on the cognitive performance of adults.
Significant differences are expected between the control (placebo) and experimental groups, given that studies in humans have already shown significant effects of rosemary essential oil on cognition.
Considering the inclusion and exclusion criteria of the study, participants will be allocated to either the control or experimental group.
Consequently, the application of the tests will be carried out neuropsychological tests for the pre-test evaluation, followed by aromatherapy (acute phase) and the reapplication of the tests (post-test phase 1).
For 14 days, the participants will chronically use rosemary essential oil and at the end they will participate in the reapplication of the neuropsychological tests (post-test phase 2).
For inferential analyses, the ANOVA test or its non-parametric equivalent will be used.
In addition, linear regressions may be performed to verify how much the essential oil can predict the outcome of the study's dependent variables.
Effect Size will also be calculated.
Keywords: Chronic intervention; neuropsychology; aromatherapy.
Studie Overzicht
Toestand
Actief, niet wervend
Conditie
Interventie / Behandeling
Studietype
Ingrijpend
Inschrijving (Werkelijk)
63
Fase
- Niet toepasbaar
Contacten en locaties
In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.
Studie Locaties
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Paraíba
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João Pessoa, Paraíba, Brazilië, 58062-106
- Helô
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Deelname Criteria
Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
Accepteert gezonde vrijwilligers
Ja
Beschrijving
Inclusion Criteria:
- 1a Healthy adults
- 1b should be able to inhale the essential oil
Exclusion Criteria:
- 2a Neurodegenerative diseases
- 2b Traumatic brain injury
- 2c Brain tumors
- 2d Multiple sclerosis
- 2e Epileptic seizures
- 2f Anxiety Disorder
- 2g Depressive Disorders,
- 2h Uncontrolled arterial hypertension,
- 2i nutritional deficiency or thyroid disease.
Studie plan
Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Ander
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Dubbele
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Experimenteel: essential oil of Rosmarinus officinalis 1
Inhalation of 2 drops of rosemary camphor essential oil for 5 minutes, once a day for 1 week consecutive on a cotton pad followed
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oil essential
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Geen tussenkomst: Placebo
Inhalation of 2 drops of sunflower essential oil for 5 minutes, once a day for 1 week consecutive on a cotton pad followed
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Actieve vergelijker: essential oil of Rosmarinus officinalis 2
Inhalation of 2 drops of rosemary cineol essential oil for 5 minutes, for once a day for 1 week consecutive on a cotton pad followed
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oil essential
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
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STROOP TEST
Tijdsspanne: Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Unit of measurement: time (seconds)
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Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Subteste Digits of the Test WAIS-III - (Wechsler Adult Scale)
Tijdsspanne: Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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1a. Maximum raw score: 30 1b. Minimum raw score: 2 |
Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Subtest Number and Letter Sequence of the WAIS-III Test - (Wechsler Adult Scale)
Tijdsspanne: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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1.0 Measurement Units: raw score 1a. Maximum raw score: 21 1b. Minimum raw score: 0 |
Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Tower of London
Tijdsspanne: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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1.0 Measurement Units: raw score 1a. Maximum raw score: 46 1b. Minimum raw score: 0 |
Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Token Test
Tijdsspanne: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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1.0 Measurement Units: raw score 1a. Maximum raw score: 36 1b. Minimum raw score: 0 |
Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Corsi Blocks
Tijdsspanne: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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1.0 Measurement Units: raw score 1a. Maximum raw score: 30 1b. Minimum raw score: 0 |
Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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Hopkins Verbal Learning
Tijdsspanne: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
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1.0 Measurement Units: raw score 1a. Maximum raw score: 0 1b. Minimum raw score: 36 |
Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
Medewerkers en onderzoekers
Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.
Sponsor
Studie record data
Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.
Bestudeer belangrijke data
Studie start (Werkelijk)
1 maart 2025
Primaire voltooiing (Geschat)
1 december 2026
Studie voltooiing (Geschat)
31 december 2026
Studieregistratiedata
Eerst ingediend
13 april 2026
Eerst ingediend dat voldeed aan de QC-criteria
28 april 2026
Eerst geplaatst (Werkelijk)
1 mei 2026
Updates van studierecords
Laatste update geplaatst (Werkelijk)
1 mei 2026
Laatste update ingediend die voldeed aan QC-criteria
28 april 2026
Laatst geverifieerd
1 april 2026
Meer informatie
Termen gerelateerd aan deze studie
Andere studie-ID-nummers
- 80434324.0.0000.5188
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Nee
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
Nee
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