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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 1Phase 2 Interventional

Combination Therapy in Amyotrophic Lateral Sclerosis (ALS)

NCT00919555
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Pioglitazone and Tretinoin, Tretinoin and Pioglitazone HCL, Placebo
Drug
Lead sponsor
Phoenix Neurological Associates, LTD
Other
Eligibility
18 Years to 85 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Nov 29, 2012 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 1 Interventional

ATRA, Celecoxib, and Itraconazole as Maintenance

NCT02401295
View directory record Official record
Conditions
Relapsed Multiple Myeloma
Interventions
ATRA, Celecoxib, Itraconazole
Drug
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 75 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 22, 2017 · Synced Sep 28, 2026, 10:14 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

An Open-Label, Dose-Escalation/Dose-Expansion Safety Study of INCB059872 in Subjects With Advanced Malignancies

NCT02712905
View directory record Official record
Conditions
Solid Tumors and Hematologic Malignancy
Interventions
INCB059872, all-trans retinoic acid (ATRA), azacitidine, nivolumab
Drug
Lead sponsor
Incyte Corporation
Industry
Eligibility
18 Years and older
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
11
States / cities
Birmingham, Alabama • La Jolla, California • Los Angeles, California + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2025 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Bioequivalence Study of Isotretinoin Capsules 40 mg Under Fed Condition

NCT01888328
View directory record Official record
Conditions
Healthy
Interventions
Isotretinoin
Drug
Lead sponsor
Dr. Reddy's Laboratories Limited
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001
U.S. locations
1
States / cities
Quadrangle Drive, Chapel Hill,, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 26, 2013 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 4 Interventional Results available

Effects of Isotretinoin on CYP2D6 Activity

NCT03076021
View directory record Official record
Conditions
CYP2D6 Polymorphism
Interventions
Isotretinoin, dextromethorphan
Drug
Lead sponsor
University of Washington
Other
Eligibility
12 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 27, 2025 · Synced Sep 28, 2026, 10:14 AM EDT
Recruiting Phase 1 Interventional

Determine Safety & Recommended Phase 2 Dosing of Zeaxanthin Alone or in Combination w/Pembrolizumab in Patients With Metastatic Cancer

NCT05232409
View directory record Official record
Conditions
Cancer Metastatic, Metastatic Solid Tumor
Interventions
Zeaxanthin, Zeaxanthin Plus Pembrolizumab
Biological · Combination Product
Lead sponsor
Valley Health System
Other
Eligibility
18 Years to 99 Years
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Paramus, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Sep 28, 2026, 10:14 AM EDT
Terminated Phase 1Phase 2 Interventional

Arsenic Trioxide With or Without Tretinoin in Treating Patients With Hematologic Cancer That Has Not Responded to Previous Therapy

NCT00006220
View directory record Official record
Conditions
Leukemia, Lymphoma, Multiple Myeloma and Plasma Cell Neoplasm, Myelodysplastic Syndromes
Interventions
arsenic trioxide, tretinoin
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
15 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 5, 2013 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study Comparing Tretinoin Gel Microsphere, 0.04% and RETIN-A MICRO ® Gel Microsphere, 0.04% in the Treatment of Acne Vulgaris

NCT07469228
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Tretinoin Gel Microsphere, 0.04%, RETIN-A MICRO® (Tretinoin) Gel Microsphere, 0.04%, Placebo Control
Drug
Lead sponsor
Sun Pharmaceutical Industries, Inc.
Industry
Eligibility
12 Years to 40 Years
Enrollment
1,043 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Profiling the Skin Microbiome in Response to Altreno in Acne Patients

NCT04548349
View directory record Official record
Conditions
Acne, Healthy
Interventions
Altreno, Benzoyl peroxide
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 40 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 5, 2024 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 2 Interventional Results available

Lycopene in Treating Patients Undergoing Radical Prostatectomy for Prostate Cancer

NCT00450749
View directory record Official record
Conditions
Adenocarcinoma of the Prostate, Stage I Prostate Cancer, Stage II Prostate Cancer, Stage III Prostate Cancer
Interventions
placebo, therapeutic conventional surgery, laboratory biomarker analysis, lycopene
Other · Procedure · Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older · Male only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 17, 2019 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Micronutrients to Prevent Noise-induced Hearing Loss

NCT00808470
View directory record Official record
Conditions
Noise-Induced Hearing Loss
Interventions
beta-carotene, vitamins C and E, magnesium, Placebo
Drug · Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 35 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 18, 2017 · Synced Sep 28, 2026, 10:14 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Correlation Between Skin Carotenoid Levels and Previous History of Skin Cancer

NCT00836342
View directory record Official record
Conditions
Skin Cancer, Basal Cell Carcinoma, Squamous Cell Carcinoma
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
50 Years to 75 Years
Enrollment
81 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 24, 2012 · Synced Sep 28, 2026, 10:14 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Oral Supplementation of Astaxanthin on Skin Photoaging, Hydration and Elasticity

NCT05882084
View directory record Official record
Conditions
Photoaging
Interventions
Astaxanthin 6 mg daily, Placebo
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
30 Years to 55 Years · Female only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Clinical Evaluation of the Photoallergy Potential of Atralin Gel

NCT00603772
View directory record Official record
Conditions
Healthy
Interventions
Atralin (tretinoin) gel, 0.05%
Drug
Lead sponsor
Coria Laboratories, Ltd.
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated May 5, 2008 · Synced Sep 28, 2026, 10:14 AM EDT
Withdrawn Phase 4 Interventional

Trial of an Injectable Biologic and U0279 as Combination Therapy for Severe Plaque-Type Psoriasis

NCT00832364
View directory record Official record
Conditions
Plaque Psoriasis
Interventions
Acitretin (also called U0279), Placebo, Etanercept
Drug · Biological
Lead sponsor
Stiefel, a GSK Company
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
3
States / cities
San Francisco, California • Louisville, Kentucky • New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 20, 2015 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 2 Interventional Results available

To Immunize Patients With Extensive Stage SCLC Combined With Chemo With or Without All Trans Retinoic Acid

NCT00617409
View directory record Official record
Conditions
Small Cell Lung Cancer
Interventions
Paclitaxel, Drug: Ad.p53-DC vaccines, All -trans Retinoic Acid (ATRA)
Drug · Biological
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2019
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Nov 7, 2019 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice

NCT01909063
View directory record Official record
Conditions
Vitamin D Deficiency, Hypovitaminosis A, Vitamin E Deficiency
Interventions
Vitamin D, Vitamin D, Vitamin E, and Vitamin A, Control, 700 mg Calcium
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
6 Years to 10 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 27, 2017 · Synced Sep 28, 2026, 10:14 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Food Frequency Questionnaires in Estimating Food Nutrient Intake in Healthy Young Adults

NCT02610023
View directory record Official record
Conditions
Healthy Subject
Interventions
Questionnaire Administration, Laboratory Biomarker Analysis, Spectroscopy
Other · Device
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
20 Years to 50 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Weekly Isotretinoin Therapy Study

NCT04594759
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Isotretinoin
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
12 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 8, 2022 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Small Daily Doses of B-carotene on Breast Milk Retinol

NCT01803659
View directory record Official record
Conditions
Vitamin A Status
Interventions
b-carotene, retinyl palmitate, placebo
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2015 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Novel Metabolites of Beta-Carotene and Lycopene

NCT02550483
View directory record Official record
Conditions
Healthy
Interventions
Base diet + high beta-carotene tomato juice, Base diet + high lycopene tomato juice, Base diet + placebo beverage
Other
Lead sponsor
USDA Beltsville Human Nutrition Research Center
Federal
Eligibility
21 Years to 75 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Beltsville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 25, 2018 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

LycoRed 40051 Product as a Countermeasure to Exercise Stress

NCT02369666
View directory record Official record
Conditions
Inflammation
Interventions
LycoRed (code 40051) product, Placebo
Dietary Supplement
Lead sponsor
Appalachian State University
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 15, 2015 · Synced Sep 28, 2026, 10:14 AM EDT
Completed Phase 1Phase 2 Interventional

Vitamin A Supplementation for Extremely-Low-Birth-Weight Infants

NCT01203488
View directory record Official record
Conditions
Infant, Newborn, Infant, Low Birth Weight, Infant, Small for Gestational Age, Infant, Premature, Bronchopulmonary Dysplasia, Respiration, Artificial, Respiratory Distress Syndrome, Newborn, Sepsis
Interventions
Vitamin A, Sham Procedure
Drug · Other
Lead sponsor
NICHD Neonatal Research Network
Network
Eligibility
24 Hours to 96 Hours
Enrollment
807 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 1999
U.S. locations
11
States / cities
Palo Alto, California • New Haven, Connecticut • Washington D.C., District of Columbia + 8 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2017 · Synced Sep 28, 2026, 10:14 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Lutein, Zeaxathin, and Fish Oil Supplementation

NCT06489873
View directory record Official record
Conditions
Cognitive Performance, Age-Related Macular Degeneration, Bone Loss
Interventions
Active Comparator (Lutein, zeaxanthin, and fish oil supplement (LZF), Placebo Comparator
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 28, 2026, 10:14 AM EDT