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Showing 1–24 of 48 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: dietary carotenoids Clear all
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 16, 2023 · Synced Sep 24, 2026, 4:30 AM EDT
Withdrawn Phase 2 Interventional

Carotenoid Rich Diet in Treating Cervical Dysplasia

NCT00003094
View directory record Official record
Conditions
Cervical Cancer
Interventions
preventative dietary intervention
Other
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 55 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1997
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Lipids as Primary Modulators of Carotenoid Absorption in Vegetables

NCT01006174
View directory record Official record
Conditions
Absorption of Carotenoids From Vegetables
Interventions
Soybean Oil, Canola Oil, Butter
Other
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 50 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Jan 16, 2013 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment of the Effects of a Daily Supplement 4Life Transfer Factor Vista Containing AREDS2 Formula on Skin Carotenoid Levels Using a Non-invasive Detection

NCT07513597
View directory record Official record
Conditions
Skin Carotenoids
Interventions
Dietary Supplement
Other
Lead sponsor
4Life Research, LLC
Industry
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Sandy City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Randomized Trial of DHA for Retinitis Pigmentosa Patients Receiving Vitamin A

NCT00000116
View directory record Official record
Conditions
Retinitis Pigmentosa
Interventions
Vitamin A, Docosahexaenoic acid, Control fatty acid
Dietary Supplement
Lead sponsor
Carol Weigel DiFranco
NIH
Eligibility
18 Years to 55 Years
Enrollment
221 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1996 – 2002
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 7, 2023 · Synced Sep 24, 2026, 4:30 AM EDT
Withdrawn Phase 2 Interventional

The Role of Antioxidant Supplementation in Keratoconus Patients

NCT02827747
View directory record Official record
Conditions
Keratoconus
Interventions
Antioxidants (Vitamins A,C,E) plus GSH, Placebo, Centrum, Dietary Sources
Other · Dietary Supplement · Combination Product
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 45 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Palm Beach Gardens, Florida
Source: ClinicalTrials.gov public record
Updated Aug 15, 2021 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Vitamin A Equivalence of Plant Carotenoids in Children

NCT00680212
View directory record Official record
Conditions
Vitamin A Deficiency
Interventions
dietary carotenoids, spinach, rice, and synthetic beta-carotene
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
6 Years to 8 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 17, 2009 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional

Increased Access to Fruits and Vegetables for Hypertension in Immigrant Hispanic/Latinx Individuals

NCT05802134
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
Fruit and vegetable supplement, Dietary and chronic disease management education
Dietary Supplement · Behavioral
Lead sponsor
St. Catherine University
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
5
States / cities
Apple Valley, Minnesota • Fridley, Minnesota • Minneapolis, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 27, 2024 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional

"Night Vision and Carotenoids"

NCT04741763
View directory record Official record
Conditions
Macular Degeneration
Interventions
EyePromise Visual Edge
Dietary Supplement
Lead sponsor
Robert Davis
Other
Eligibility
50 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
2
States / cities
North Chicago, Illinois • Oak Lawn, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 4, 2021 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional

Feeding Trial to Determine How Combinations of Different Dietary Bioactive Ingredients Influence High Density Lipoprotein (HDL) Metabolism

NCT01803594
View directory record Official record
Conditions
Dyslipidemia
Interventions
Krill Oil, Lutein, Nicotinic acid, Dairy phospholipids, Control
Dietary Supplement · Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2022 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Healthy Online Parental Education Project to Increase Fruit and Vegetable Intake and Active Playtime Among Toddlers

NCT05085041
View directory record Official record
Conditions
Eating Behavior
Interventions
Multi-Component eHealth Intervention, namely Healthy Online Parental Education (HOPE)
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years and older
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Oct 6, 2022 · Synced Sep 24, 2026, 4:30 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 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparison of Beta-cryptoxanthin Bioavailability From Biofortified Maize in Humans

NCT02800408
View directory record Official record
Conditions
β-cryptoxanthin Bioavailability From Biofortified Maize in Humans
Interventions
Whole grain high-BCX maize, Refined grain high-BCX maize, Whole grain white maize
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
20 Years to 28 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 23, 2019 · Synced Sep 24, 2026, 4:30 AM EDT
Not listed Phase 3 Interventional

Diet and Physical Activity Change or Usual Care in Improving Progression-Free Survival in Patients With Previously Treated Stage II, III, or IV Ovarian, Fallopian Tube, or Primary Peritoneal Cancer

NCT00719303
View directory record Official record
Conditions
Fallopian Tube Clear Cell Adenocarcinoma, Fallopian Tube Endometrioid Adenocarcinoma, Fallopian Tube Mucinous Adenocarcinoma, Fallopian Tube Serous Adenocarcinoma, Fallopian Tube Transitional Cell Carcinoma, Malignant Ovarian Brenner Tumor, Ovarian Clear Cell Adenocarcinoma, Ovarian Endometrioid Adenocarcinoma, Ovarian Mucinous Adenocarcinoma, Ovarian Seromucinous Carcinoma, Ovarian Serous Adenocarcinoma, Ovarian Transitional Cell Carcinoma, Primary Peritoneal Serous Adenocarcinoma, Stage IIA Fallopian Tube Cancer AJCC v6 and v7, Stage IIA Ovarian Cancer AJCC V6 and v7, Stage IIB Fallopian Tube Cancer AJCC v6 and v7, Stage IIB Ovarian Cancer AJCC v6 and v7, Stage IIC Fallopian Tube Cancer AJCC v6 and v7, Stage IIC Ovarian Cancer AJCC v6 and v7, Stage IIIA Fallopian Tube Cancer AJCC v7, Stage IIIA Ovarian Cancer AJCC v6 and v7, Stage IIIA Primary Peritoneal Cancer AJCC v7, Stage IIIB Fallopian Tube Cancer AJCC v7, Stage IIIB Ovarian Cancer AJCC v6 and v7, Stage IIIB Primary Peritoneal Cancer AJCC v7, Stage IIIC Fallopian Tube Cancer AJCC v7, Stage IIIC Ovarian Cancer AJCC v6 and v7, Stage IIIC Primary Peritoneal Cancer AJCC v7, Stage IV Fallopian Tube Cancer AJCC v6 and v7, Stage IV Ovarian Cancer AJCC v6 and v7, Stage IV Primary Peritoneal Cancer AJCC v7, Undifferentiated Fallopian Tube Carcinoma, Undifferentiated Ovarian Carcinoma
Interventions
Behavioral Dietary Intervention, Compliance Monitoring, Counseling, Educational Intervention, Exercise Intervention, Laboratory Biomarker Analysis, Quality-of-Life Assessment, Questionnaire Administration
Behavioral · Other
Lead sponsor
Gynecologic Oncology Group
Network
Eligibility
18 Years and older · Female only
Enrollment
1,070 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2012
U.S. locations
687
States / cities
Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 452 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2018 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Antioxidants on Human Macular Pigments

NCT00718653
View directory record Official record
Conditions
Eye Health
Interventions
Lutein, Lutein plus green tea extract
Dietary Supplement
Lead sponsor
National Eye Institute (NEI)
NIH
Eligibility
50 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2007
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 2, 2009 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Healthy Living Opportunities: Laurel HARVEST

NCT06438003
View directory record Official record
Conditions
Health Knowledge, Attitudes, Practice, Obesity
Interventions
Special Services, Services as Usual
Behavioral · Other
Lead sponsor
Makenzie Barr-Porter
Other
Eligibility
18 Years and older
Enrollment
281 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Lycopene in Preventing Prostate Cancer in Healthy Participants

NCT00093561
View directory record Official record
Conditions
Prostate Cancer
Interventions
lycopene
Dietary Supplement
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 45 Years · Male only
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 25, 2013 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Gojiberry Intake (Lycium Barbarium) on Macular Function

NCT03983525
View directory record Official record
Conditions
Macular Pigment Optical Density
Interventions
Goji berry, Lutein + zeaxanthin supplementation
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
45 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bioavailability of Golden Rice Carotenoids in Humans

NCT00680355
View directory record Official record
Conditions
Healthy
Interventions
golden rice, corn oil 0g, corn oil 10g, coren oil 5 g
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
40 Years to 70 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 30, 2013 · Synced Sep 24, 2026, 4:30 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 24, 2026, 4:30 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 24, 2026, 4:30 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Healthy Children, Healthy Communities: Effectiveness of a Multilevel Rural Community Engagement Model for Improving Children's Dietary Intake in Family Child Care Homes

NCT07160530
View directory record Official record
Conditions
Childhood Obesity Pevention, Diet Quality, Feeding Behaviors, Health Behavior Change, Rural Health
Interventions
EAT Family Style, Better Kid Care
Behavioral
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
3 Years and older
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Results available

Family-based Lifestyle Intervention Program and Carotenoid Supplementation for Children With Obesity

NCT02060279
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Lifestyle intervention and carotenoid supplements, Lifestyle intervention and placebo
Other
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
8 Years to 11 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 17, 2024 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Feasibility of Rice Bran Supplementation in Children

NCT02557373
View directory record Official record
Conditions
Dietary Rice Bran Supplementation
Interventions
Vitamin A, Rice Bran + Vitamin A
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
4 Months to 10 Months
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 20, 2017 · Synced Sep 24, 2026, 4:30 AM EDT