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ClinicalTrials.gov public records Last synced Oct 17, 2026, 5:40 PM EDT

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Showing 1–24 of 35 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: selenium placebo Clear all
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults

NCT02876315
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Redoxon VI, placebo
Dietary Supplement
Lead sponsor
Oregon State University
Other
Eligibility
55 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 1, 2022 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Results available

Trial of Glutamine and Antioxidant Supplementation in Critically Ill Patients

NCT00133978
View directory record Official record
Conditions
Critical Illness, Sepsis, Multiple Organ Failure
Interventions
Glutamine, Antioxidants, Glutamine + Antioxidants, Placebo
Other
Lead sponsor
Daren K. Heyland
Other
Eligibility
18 Years and older
Enrollment
1,223 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2012
U.S. locations
5
States / cities
Aurora, Colorado • Louisville, Kentucky • Dayton, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 7, 2021 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

S0000B: Vitamin E and/or Selenium in Preventing Cataract and Age-Related Macular Degeneration in Men on SELECT SWOG-S0000

NCT00784225
View directory record Official record
Conditions
Cataract, Macular Degeneration
Interventions
selenium, vitamin E, vitamin E placebo, selenium placebo
Drug
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
50 Years to 120 Years · Male only
Enrollment
13,475 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 14, 2019 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Results available

Glutathione Metabolism in Adolescents With Type 1 Diabetes - Study B

NCT00858273
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
Antioxidant supplement, Diabetes treatment, Regular Insulin
Dietary Supplement · Other · Drug
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
12 Years to 21 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 17, 2023 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Influence of Selenium on Prostate Cancer Related Biomarkers

NCT01112449
View directory record Official record
Conditions
Effect of Selenium on Oxidative Stress in Healthy Men
Interventions
Placebo, selenomethionine, low dose selenized-yeast, high dose selenized-yeast
Other · Dietary Supplement
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
20 Years to 79 Years · Male only
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2014
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 10, 2015 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 2 Interventional Results available

Alii Supplement Study

NCT07271316
View directory record Official record
Conditions
Nutrient Deficiency, Happiness, Digestive Health, Vulnerability to Disease, Mood Swings, Energy
Interventions
Alii Supplement
Dietary Supplement
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 25 Years · Female only
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Study to Evaluate SPI-1005 in Adults With Meniere's Disease

NCT02603081
View directory record Official record
Conditions
Meniere's Disease
Interventions
SPI-1005
Drug
Lead sponsor
Sound Pharmaceuticals, Incorporated
Industry
Eligibility
19 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
5
States / cities
Los Angeles, California • New York, New York • Charleston, South Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Oct 17, 2026, 5:40 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

A Study to Assess the Impact of a Nutritional Supplement on Wellbeing and Nutrient Absorption

NCT06749808
View directory record Official record
Conditions
Nutrition Status
Interventions
Carotenoid Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Pharmanex
Industry
Eligibility
20 Years to 65 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Provo, Utah
Source: ClinicalTrials.gov public record
Updated Dec 31, 2024 · Synced Oct 17, 2026, 5:40 PM EDT
Not listed Early Phase 1 Interventional Accepts healthy volunteers

Colon Cancer Prevention Using Selenium

NCT01211561
View directory record Official record
Conditions
Prevention of Colorectal Cancer
Interventions
Selenium, selenomethionine, placebo
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
50 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 29, 2010 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

AT-001 for Long-term Preservation of Brain Health in Aging

NCT03062384
View directory record Official record
Conditions
Oxidative Stress
Interventions
AT-001, Placebo
Dietary Supplement
Lead sponsor
University of Kentucky
Other
Eligibility
65 Years and older
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Aug 20, 2019 · Synced Oct 17, 2026, 5:40 PM EDT
Not listed Phase 2 Interventional

Selenium as a Potential Treatment for Moderately-ill, Severely-ill, and Critically-ill COVID-19 Patients.

NCT04869579
View directory record Official record
Conditions
Covid19
Interventions
Selenium (as Selenious Acid), Placebo
Drug · Other
Lead sponsor
CHRISTUS Health
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Longview, Texas
Source: ClinicalTrials.gov public record
Updated Aug 3, 2021 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Predicting Dietary Selenium Needs to Achieve Target Blood Selenium Levels

NCT00803699
View directory record Official record
Conditions
Nutritional Requirements
Interventions
placebo, selenium as L-selenomethionine
Dietary Supplement
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
18 Years and older
Enrollment
262 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated May 29, 2018 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional

Selenium Sulfide, Ketoconazole and Ciclopirox Shampoo as Additional Treatments for Tinea Capitis (Scalp Ringworm)

NCT00127868
View directory record Official record
Conditions
Tinea Capitis
Interventions
oral griseofulvin, selenium sulfide shampoo 1%, ciclopirox shampoo , ketoconazole shampoo 2%, baby shampoo
Drug
Lead sponsor
Chen, Catherine, M.D.
Other
Eligibility
12 Months to 12 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 9, 2008 · Synced Oct 17, 2026, 5:40 PM EDT
Terminated Not applicable Interventional

Selenium Supplementation of Patients With Cirrhosis

NCT00271245
View directory record Official record
Conditions
Liver Disease
Interventions
200 µg selenium as selenate, 400 µg selenium as selenate, 200 µg selenium as selenomethionine, Placebo
Dietary Supplement
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 7, 2012 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 2 Interventional

Selenium in Treating Patients With Prostate Cancer

NCT00752739
View directory record Official record
Conditions
Prostate Cancer
Interventions
selenium, placebo
Dietary Supplement · Other
Lead sponsor
University of Arizona
Other
Eligibility
Up to 85 Years · Male only
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 15, 2012 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Efficacy and Safety of Clear Skin Formula on Mitigating Mild to Moderate Non-cystic Acne

NCT05879406
View directory record Official record
Conditions
Non-Cystic Acne
Interventions
VitaMedica® Clear Skin Formula capsules, Placebo Capsules
Dietary Supplement · Other
Lead sponsor
Ablon Skin Institute Research Center
Other
Eligibility
18 Years to 40 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Manhattan Beach, California
Source: ClinicalTrials.gov public record
Updated Apr 6, 2025 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Supplementary Vitamins on Oxidant Gene Expression in the Lungs of Healthy Smokers

NCT00565214
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease (COPD)
Interventions
Group 1, Group 2
Dietary Supplement
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 70 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 25, 2017 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 3 Interventional Results available

Selenium in Preventing Tumor Growth in Patients With Previously Resected Stage I Non-small Cell Lung Cancer

NCT00008385
View directory record Official record
Conditions
Lung Cancer
Interventions
placebo, selenium
Other · Drug
Lead sponsor
ECOG-ACRIN Cancer Research Group
Network
Eligibility
18 Years and older
Enrollment
1,772 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2019
U.S. locations
515
States / cities
Mobile, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 339 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

S0000 Selenium and Vitamin E in Preventing Prostate Cancer

NCT00006392
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin E, Selenium, Vitamin E placebo, selenium placebo
Drug · Other
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
50 Years to 120 Years · Male only
Enrollment
35,533 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2012
U.S. locations
13
States / cities
Chicago, Illinois • Joliet, Illinois • Maywood, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 20, 2015 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Se-Methyl-Seleno-L-Cysteine or Selenomethionine in Preventing Prostate Cancer in Healthy Participants

NCT01497431
View directory record Official record
Conditions
No Evidence of Disease, Prostate Carcinoma
Interventions
Selenium, Placebo, Laboratory Biomarker Analysis, Pharmacological Study, Methylselenocysteine
Dietary Supplement · Other · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
40 Years to 80 Years · Male only
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
3
States / cities
Chicago, Illinois • Buffalo, New York • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 26, 2014 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 2 Interventional Results available

Selenomethionine and Finasteride Before Surgery or Radiation Therapy in Treating Patients With Stage I or Stage II Prostate Cancer

NCT00736645
View directory record Official record
Conditions
Prostate Cancer
Interventions
selenomethionine, finasteride, placebo
Dietary Supplement · Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2023 · Synced Oct 17, 2026, 5:40 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

S0000D: Effect of Vitamin E and/or Selenium on Colorectal Polyps in Men Enrolled on SELECT Trial SWOG-S0000

NCT00706121
View directory record Official record
Conditions
Colorectal Cancer, Precancerous Condition
Interventions
Vitamin E, Selenium, Vitamin E placebo, selenium placebo
Drug
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
50 Years to 120 Years · Male only
Enrollment
8,094 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2018
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Oct 17, 2026, 5:40 PM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Selenium for Prevention of Adenomatous Colorectal Polyps

NCT00078897
View directory record Official record
Conditions
Colorectal Cancer, Adenomatous Colorectal Polyps, Precancerous Condition
Interventions
Selenium
Drug
Lead sponsor
University of Arizona
Other
Eligibility
40 Years to 80 Years
Enrollment
1,621 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2018
U.S. locations
7
States / cities
Phoenix, Arizona • Scottsdale, Arizona • Tucson, Arizona + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2019 · Synced Oct 17, 2026, 5:40 PM EDT
Terminated Phase 4 Interventional Results available

The Effect of Selenium Supplementation Among Pediatric Patients With Burns

NCT00860379
View directory record Official record
Conditions
Burns
Interventions
Selenium1, Selenium2, Placebo
Drug
Lead sponsor
Shriners Hospitals for Children
Other
Eligibility
1 Year to 18 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 29, 2021 · Synced Oct 17, 2026, 5:40 PM EDT