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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Nutritional Supplementation Clear all
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

This Repeated Measures Parallel-group Investigation Will Examine the Influence of Short-term Melatonin Supplementation (5mg, 3 x Day for 72 Hours) on Cellular Responses, Functional Performance and Recovery Following an Acute Bout of Dynamic Resistance Exercise in Resistance Trained Men and Women

NCT06617351
View directory record Official record
Conditions
Cell Migration, Cell Invasion, Exercise Recovery
Interventions
Melatonin, Placebo
Dietary Supplement
Lead sponsor
University of Central Florida
Other
Eligibility
18 Years to 40 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Sep 30, 2024 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional

A Randomized Triple-Blind Placebo-Controlled Study to Evaluate the Effects of a Supplement on Lower Urinary Tract Symptoms in Men.

NCT06504472
View directory record Official record
Conditions
Lower Urinary Tract Symptoms, Benign Prostatic Hyperplasia, Erectile Dysfunction
Interventions
ProstaThrive™ Supplement, Placebo
Dietary Supplement
Lead sponsor
Optimale
Industry
Eligibility
40 Years and older · Male only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Jul 15, 2024 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

L-citrulline Supplementation, Cold Exposure, & Post-Exercise Muscle Ischemia

NCT02104375
View directory record Official record
Conditions
Hypertension
Interventions
L-citrulline
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Mar 9, 2015 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Results available

Does a Daily Iron Tablet Improve Anemia in Cystic Fibrosis

NCT01755455
View directory record Official record
Conditions
Cystic Fibrosis, Anemia, Iron-Deficiency
Interventions
Ferrous sulfate 325mg, Placebo
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 70 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
2
States / cities
Portland, Maine • Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Mar 15, 2017 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Phase 4 Interventional Results available

Unique Effects of Perimenstrual Estradiol or Progesterone Supplementation on Perimenstrual Suicidality

NCT03498313
View directory record Official record
Conditions
Suicidal Ideation
Interventions
Transdermal Estradiol + Placebo, Oral Micronized Progesterone + Placebo, Placebos
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 13, 2022 · Synced Sep 24, 2026, 1:24 PM EDT
Terminated Phase 2 Interventional Results available

Zinc and Green Tea Extract for Community Respiratory Viral Infections

NCT04898023
View directory record Official record
Conditions
Respiratory Viral Infection
Interventions
zinc-green tea extract-ascorbic acid, Placebo
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigation of an Amino Acid Supplement on Glucose Levels in Obese Subjects

NCT03715010
View directory record Official record
Conditions
Pre-diabetes, Obese, Glucose Intolerance
Interventions
BCAA
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
20 Years to 65 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 19, 2019 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Lactoferrin, a Dietary Supplement, vs. Placebo on Respiratory Tract Infections

NCT04713735
View directory record Official record
Conditions
Immune Health
Interventions
Control: Placebo, bovine lactoferrin supplement
Dietary Supplement
Lead sponsor
Mead Johnson Nutrition
Industry
Eligibility
55 Years and older
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 17, 2023 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin/Mineral Supplement for Children With Autism

NCT04845776
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
ANRC Essentials Plus
Dietary Supplement
Lead sponsor
Arizona State University
Other
Eligibility
3 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 8, 2023 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Long-term Effects of Blueberry Supplementation on Brain Health in Older Adults

NCT05764824
View directory record Official record
Conditions
Cognitive Decline, Nutrition, Healthy, Brain Injuries
Interventions
Blueberry powder, Controlled and matched powder
Dietary Supplement · Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
65 Years to 99 Years
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Pharmacokinetic Study of Daily Versus Monthly High-Dose Cholecalciferol Supplementation

NCT01079923
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Single High Dose Cholecalciferol, Daily Dose Cholecalciferol
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 19, 2012 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional

CoQ10 Biomarker Trial

NCT01408680
View directory record Official record
Conditions
Oxidative Stress, Inflammation, Endothelial Dysfunction
Interventions
Coenzyme Q10, Placebo
Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 85 Years
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 3, 2014 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Dietary Supplement Containing Salacia Extract, Citrus Bioflavonoids, and Trivalent Chromium on Markers of Glucose Control

NCT05887050
View directory record Official record
Conditions
Glucose Intolerance
Interventions
Active, Placebo
Dietary Supplement
Lead sponsor
The Center for Applied Health Sciences, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Canfield, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 4, 2023 · Synced Sep 24, 2026, 1:24 PM EDT
Withdrawn Phase 1 Interventional

Randomized Study Comparing Ferric Carboxymaltose to Iron Sucrose to Treat Fe Deficiency in the Surgically Critically Ill

NCT02009943
View directory record Official record
Conditions
ICU Anemia, Functional Iron Deficiency
Interventions
Ferric carboxymaltose, Iron sucrose
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 11, 2018 · Synced Sep 24, 2026, 1:24 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effect of Beetroot Juice Supplementation Dose on Neuromuscular Performance During Resistance Exercise

NCT05957835
View directory record Official record
Conditions
High Nitrate Dose, Moderate Nitrate Dose, Low Nitrate Dose, Nitrate-depleted Dose
Interventions
BR-HIGH, BR-MOD, BR-LOW, PL
Dietary Supplement
Lead sponsor
Pepperdine University
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Malibu, California
Source: ClinicalTrials.gov public record
Updated Jul 23, 2023 · Synced Sep 24, 2026, 1:24 PM EDT
Terminated Not applicable Interventional

CuraLin Herbal Supplement for Type 2 Diabetes

NCT05267925
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
CuraLin
Dietary Supplement
Lead sponsor
National University of Natural Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
2
States / cities
Portland, Oregon • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 4, 2023 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effects of Pau d' Arco in Primary Dysmenorrhea

NCT04245540
View directory record Official record
Conditions
Primary Dysmenorrhea
Interventions
Pau d' Arco
Dietary Supplement
Lead sponsor
National University of Natural Medicine
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 23, 2023 · Synced Sep 24, 2026, 1:24 PM EDT
Terminated Phase 4 Interventional Results available

L-Carnitine L-Tartrate in Preventing Peripheral Neuropathy Caused By Chemotherapy in Women With Metastatic Breast Cancer

NCT00754767
View directory record Official record
Conditions
Breast Cancer, Chemotherapeutic Agent Toxicity, Neurotoxicity
Interventions
L-carnitine L-tartrate, placebo
Drug · Other
Lead sponsor
HealthPartners Institute
Other
Eligibility
18 Years to 120 Years · Female only
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
2
States / cities
Minneapolis, Minnesota • Saint Louis Park, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 10, 2017 · Synced Sep 24, 2026, 1:24 PM EDT
Withdrawn Not applicable Interventional

Optimal Protein Supplementation for Critically Ill Patients

NCT01934595
View directory record Official record
Conditions
Critical Illness
Interventions
Beneprotein
Dietary Supplement
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jun 6, 2017 · Synced Sep 24, 2026, 1:24 PM EDT
Recruiting Not applicable Interventional

A Randomized Controlled Trial of Thyroid Hormone Supplementation in Hemodialysis Patients

NCT03977207
View directory record Official record
Conditions
Thyroid; Functional Disturbance, Hypothyroidism, Hemodialysis
Interventions
Levothyroxine Sodium, Placebos
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 75 Years
Enrollment
336 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Phase 2 Interventional

Effectiveness of Extended Treatment for Drug Dependence (ETDD) in the City Study

NCT01153464
View directory record Official record
Conditions
Cocaine Dependence
Interventions
Recovery Support Counseling
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 75 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 29, 2017 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Phase 2 Interventional

Safety and Effectiveness Study of a Fiber Supplement for Weight Loss

NCT00613600
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Glucomannan, Inert microcrystalline cellulose
Dietary Supplement
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 1, 2011 · Synced Sep 24, 2026, 1:24 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

The Effects of Nicotinamide Riboside Supplementation on Brain NAD+/NADH Ratio and Bioenergetics

NCT03151707
View directory record Official record
Conditions
Healthy
Interventions
Nicotinamide Riboside
Drug
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 80 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 4, 2024 · Synced Sep 24, 2026, 1:24 PM EDT
Completed Phase 3 Interventional Results available

Clinical Safety Study of the Progesterone Vaginal Ring in Women Undergoing Assisted Reproductive Technology Procedures

NCT03565211
View directory record Official record
Conditions
Progesterone Supplementation in Women Undergoing ART
Interventions
Progesterone vaginal ring
Drug
Lead sponsor
Ferring Pharmaceuticals
Industry
Eligibility
18 Years to 34 Years · Female only
Enrollment
352 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
15
States / cities
Tempe, Arizona • Encino, California • Newark, Delaware + 12 more
Source: ClinicalTrials.gov public record
Updated Nov 22, 2020 · Synced Sep 24, 2026, 1:24 PM EDT