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Showing 25–45 of 21 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Olfactory Tests Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D Absorbance Study - Clinical Trial of the Absorbance of Nano Liquid D3

NCT04885803
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Softgel Vitamin D3, Nano Liquid Vitamin D3, 25(OH)D Blood Serum Test, Placebo Control
Dietary Supplement · Diagnostic Test · Other
Lead sponsor
Inspired Life Medical, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Le Sueur, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 23, 2021 · Synced Sep 22, 2026, 10:07 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Digital Accessible Remote Olfactory Mediated Health Assessments for Preclinical AD

NCT05881239
View directory record Official record
Conditions
Subjective Cognitive Concerns, Mild Cognitive Impairment, Mild Behavioral Impairment, Healthy Aging
Interventions
AROMHA Brain Health Test
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 100 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Completed No phase listed Observational Results available

Validation of a Rapid Quantitative Test for Loss of Smell in COVID-19 Subjects

NCT04431908
View directory record Official record
Conditions
COVID-19
Interventions
olfactory device
Device
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
1,320 participants
Timeline
2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 1, 2021 · Synced Sep 22, 2026, 10:07 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

ScentAware and OCT in MCI vs HC

NCT06377241
View directory record Official record
Conditions
Alzheimer Disease, Early Onset
Interventions
ScentAware, UPSIT
Device
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
50 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 22, 2025 · Synced Sep 22, 2026, 10:07 PM EDT
Recruiting Not applicable Interventional

Virtual Reality and Olfactory Stimuli Multimodal Intervention to Reduce Post-Operative Pain and Anxiety in Patients Undergoing Cardiothoracic Surgery

NCT04912531
View directory record Official record
Conditions
Postoperative Pain, Anxiety Postoperative, Opioid Use
Interventions
Virtual Realty using a Microsoft Hololens, Empatica HR wristband, and EEG, Essence Olfactory Necklace, Bedside Olfaction Device
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Completed Phase 2 Interventional Results available

Phase 2 Study of Bintrafusp Alfa in Recurrent/Metastatic Olfactory Neuroblastoma (BARON).

NCT05012098
View directory record Official record
Conditions
Olfactory Neuroblastoma, Esthesioneuroblastoma, Neoplasm of the Nasal Cavity
Interventions
Bintrafusp alfa/M7824, Ibuprofen, PET scan, CT scan, Tumor tissue biopsy, Brain MRI, Dotate scan, PET FDG scan, Nuclear bone scan, EKG
Drug · Diagnostic Test · Procedure
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 7, 2025 · Synced Sep 22, 2026, 10:07 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Stellate Ganglion Block for COVID-19-Induced Olfactory Dysfunction

NCT05445921
View directory record Official record
Conditions
Anosmia, Hyposmia, Parosmia, Olfactory Disorder
Interventions
Stellate Ganglion Block
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 11, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Treatment of Pediatric Patients That Lost Sense of Smell Due to COVID-19

NCT04964414
View directory record Official record
Conditions
Dysosmia, Anosmia, Covid19
Interventions
Smell Retraining, Budesonide
Other · Drug
Lead sponsor
Amanda Stapleton
Other
Eligibility
6 Years to 21 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 12, 2024 · Synced Sep 22, 2026, 10:07 PM EDT
Terminated Not applicable Interventional

Olfactory Training in Improving Sense of Smell After Radiation Therapy in Patients With Paranasal Sinus or Nasopharyngeal Cancer

NCT03049358
View directory record Official record
Conditions
Stage 0 Nasopharyngeal Carcinoma, Stage 0 Paranasal Sinus Cancer, Stage I Nasopharyngeal Carcinoma, Stage I Paranasal Sinus Cancer, Stage II Nasopharyngeal Carcinoma, Stage II Paranasal Sinus Cancer, Stage IIA Nasopharyngeal Carcinoma, Stage IIB Nasopharyngeal Carcinoma, Stage III Nasopharyngeal Carcinoma, Stage III Paranasal Sinus Cancer, Stage IV Nasopharyngeal Carcinoma, Stage IV Paranasal Sinus Cancer, Stage IVA Nasopharyngeal Carcinoma, Stage IVA Paranasal Sinus Cancer, Stage IVB Nasopharyngeal Carcinoma, Stage IVB Paranasal Sinus Cancer, Stage IVC Nasopharyngeal Carcinoma, Stage IVC Paranasal Sinus Cancer
Interventions
Physiologic Testing, Quality-of-Life Assessment, Sham Intervention, Therapeutic Procedure, rose essential oil, lemon essential oil, clove essential oil, eucalyptus essential oil, canola oil placebo
Other · Procedure
Lead sponsor
Stanford University
Other
Eligibility
19 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 4, 2019 · Synced Sep 22, 2026, 10:07 PM EDT
Recruiting Not applicable Interventional

Post COVID-19 Syndrome Treatment With Variable Pulse Transcranial Magnetic Stimulation

NCT06865222
View directory record Official record
Conditions
Post COVID-19 Condition
Interventions
Electromagnetic Brain Pulsing Variable Pulse Protocol (EMBP) - 2 weeks, Electromagnetic Brain Pulsing Variable Pulse Protocol (EMBP) - 4 weeks
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Discordance of Obesity in Adolescent Sibilngs

NCT02376439
View directory record Official record
Conditions
Obesity
Interventions
Kool-aid
Other
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
13 Years to 17 Years
Enrollment
176 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 4, 2020 · Synced Sep 22, 2026, 10:07 PM EDT
Completed No phase listed Observational

Legionnaires' Effect on Smell

NCT03321786
View directory record Official record
Conditions
Legionnaires' Disease
Interventions
The University of Pennsylvania Smell Identification Test (UPSIT)
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
10 participants
Timeline
2017 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 22, 2026, 10:07 PM EDT
Enrolling by invitation Not applicable Interventional

Olfactory Training in Various Populations

NCT06115291
View directory record Official record
Conditions
Olfactory Disorder, Smell Disorder, Traumatic Brain Injury, Concussion, Brain
Interventions
Smell Test
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Completed Phase 4 Interventional Results available

Olfactory Deficits in MCI as Predictor of Improved Cognition on Donepezil

NCT01845636
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Donepezil, Atropine
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
55 Years to 95 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 8, 2018 · Synced Sep 22, 2026, 10:07 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Diagnostic and Prognostic Biomarkers in Parkinson Disease

NCT00653783
View directory record Official record
Conditions
Parkinson Disease, Multiple System Atrophy, Progressive Supranuclear Palsy
Interventions
Not listed
Lead sponsor
The Parkinson Study Group
Network
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2007
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 30, 2008 · Synced Sep 22, 2026, 10:07 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

GBPDC: Gut-Brain in PD Consortium Master Protocol

NCT07567794
View directory record Official record
Conditions
Parkinson Disease (PD), PARKINSON DISEASE (Disorder), Gut Microbiome, Gut Microbiota, Prodromal Parkinsons Disease
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
21 Years to 80 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
7
States / cities
Stanford, California • Chicago, Illinois • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Eat My ABCs Project

NCT05780008
View directory record Official record
Conditions
Nutrition, Healthy, Obesity, Childhood
Interventions
Eat My ABCs
Behavioral
Lead sponsor
Michigan State University
Other
Eligibility
3 Years to 5 Years
Enrollment
202 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
Alpena, Michigan • Kalkaska, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 6, 2024 · Synced Sep 22, 2026, 10:07 PM EDT
Completed Not applicable Interventional

Cognitive and Affective Mechanisms Underlying an Olfactory Approach to Modify Cigarette Craving

NCT04902469
View directory record Official record
Conditions
Craving
Interventions
Pleasant Odor, Odor Blank
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 49 Years
Enrollment
232 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Assessing Environmental Factors in Healthcare Facilities in Order to Improve the Experience of Patients, Staff, and the Quality of Imaging Procedures

NCT03456895
View directory record Official record
Conditions
Healthcare Facility Environment - Imaging
Interventions
Light perception, Sound perception, Smell perception, Vibration perception, Voice activation
Other
Lead sponsor
University of Cincinnati
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 17, 2024 · Synced Sep 22, 2026, 10:07 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal At Home Smell Testing to Detect Infection by SARS-CoV-2

NCT05040659
View directory record Official record
Conditions
Anosmia, Asymptomatic COVID-19, COVID-19 Respiratory Infection, Influenza, Healthy, PASC Post Acute Sequelae of COVID 19
Interventions
AROMHA Longitudinal Smell Test
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 100 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Sep 22, 2026, 10:07 PM EDT
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers

Impact of Smell Testing on Health Outcomes

NCT07222891
View directory record Official record
Conditions
Olfactory Dysfunction, Wellbeing
Interventions
Patient-centered information and education
Behavioral
Lead sponsor
Monell Chemical Senses Center
Other
Eligibility
7 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Sep 22, 2026, 10:07 PM EDT