Effects of Rosemary Essential Oil on Human Cognition (Rosmarinus)
28 april 2026 uppdaterad av: 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.
Studieöversikt
Status
Aktiv, inte rekryterande
Betingelser
Intervention / Behandling
Studietyp
Interventionell
Inskrivning (Faktisk)
63
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studieorter
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Paraíba
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João Pessoa, Paraíba, Brasilien, 58062-106
- Helô
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Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
Tar emot friska volontärer
Ja
Beskrivning
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.
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Övrig
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Dubbel
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
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Experimentell: 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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Inget ingripande: 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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Aktiv komparator: 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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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
STROOP TEST
Tidsram: 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)
Tidsram: Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
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."
|
|
Subtest Number and Letter Sequence of the WAIS-III Test - (Wechsler Adult Scale)
Tidsram: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
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
Tidsram: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
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."
|
|
Token Test
Tidsram: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
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."
|
|
Corsi Blocks
Tidsram: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
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."
|
|
Hopkins Verbal Learning
Tidsram: Cognitive test were administered at the following times: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
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."
|
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Sponsor
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart (Faktisk)
1 mars 2025
Primärt slutförande (Beräknad)
1 december 2026
Avslutad studie (Beräknad)
31 december 2026
Studieregistreringsdatum
Först inskickad
13 april 2026
Först inskickad som uppfyllde QC-kriterierna
28 april 2026
Första postat (Faktisk)
1 maj 2026
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
1 maj 2026
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
28 april 2026
Senast verifierad
1 april 2026
Mer information
Termer relaterade till denna studie
Andra studie-ID-nummer
- 80434324.0.0000.5188
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