Effects of Rosemary Essential Oil on Human Cognition (Rosmarinus)
28. april 2026 oppdatert 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.
Studieoversikt
Status
Aktiv, ikke rekrutterende
Forhold
Intervensjon / Behandling
Studietype
Intervensjonell
Registrering (Faktiske)
63
Fase
- Ikke aktuelt
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
-
-
Paraíba
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João Pessoa, Paraíba, Brasil, 58062-106
- Helô
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-
Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
- Voksen
Tar imot friske frivillige
Ja
Beskrivelse
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
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Annen
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Dobbelt
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
|---|---|
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Eksperimentell: 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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Ingen inngripen: 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
|
oil essential
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
STROOP TEST
Tidsramme: Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
Unit of measurement: time (seconds)
|
Cognitive tests were administered at the following stages: "Before the intervention (baseline), immediately after the intervention, and 1 week after the intervention."
|
|
Subteste Digits of the Test WAIS-III - (Wechsler Adult Scale)
Tidsramme: 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)
Tidsramme: 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."
|
|
Tower of London
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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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Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Faktiske)
1. mars 2025
Primær fullføring (Antatt)
1. desember 2026
Studiet fullført (Antatt)
31. desember 2026
Datoer for studieregistrering
Først innsendt
13. april 2026
Først innsendt som oppfylte QC-kriteriene
28. april 2026
Først lagt ut (Faktiske)
1. mai 2026
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
1. mai 2026
Siste oppdatering sendt inn som oppfylte QC-kriteriene
28. april 2026
Sist bekreftet
1. april 2026
Mer informasjon
Begreper knyttet til denne studien
Andre studie-ID-numre
- 80434324.0.0000.5188
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