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Showing 1–24 of 74 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: soy isoflavones Clear all
Terminated Phase 2 Interventional Results available

Genistein Supplementation to Mitigate Cardiometabolic Dysfunction in Patients Undergoing Androgen Deprivation Therapy for Prostate Cancer

NCT02766478
View directory record Official record
Conditions
Prostate Cancer
Interventions
Genistein, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older · Male only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 26, 2022 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Soy on Cognition and Hot Flashes in Men With Prostate Cancer Undergoing Testosterone Suppression Therapy

NCT00245518
View directory record Official record
Conditions
Hot Flashes
Interventions
Isoflavone, Placebos
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older · Male only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 12, 2017 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 4 Interventional Results available

The Study of Soy Isoflavones in Asthma

NCT01052116
View directory record Official record
Conditions
Asthma
Interventions
Soy isoflavone supplement, Placebo
Drug
Lead sponsor
American Lung Association Asthma Clinical Research Centers
Other
Eligibility
12 Years and older
Enrollment
386 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
18
States / cities
Tucson, Arizona • San Diego, California • Denver, Colorado + 15 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2016 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Soy Supplementation and Gestational Diabetes

NCT02806739
View directory record Official record
Conditions
Gestational Diabetes
Interventions
Soy Group (Soy Protein + Isoflavones), Control Group (Minimize Soy Intake)
Dietary Supplement
Lead sponsor
University of Massachusetts, Boston
Other
Eligibility
18 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Soy and Isoflavones Effect on Bone

NCT00668447
View directory record Official record
Conditions
Osteoporosis
Interventions
Soy Isolate, Control protein, Novasoy isoflavones, Placebo tablets
Dietary Supplement
Lead sponsor
United States Department of Agriculture (USDA)
Federal
Eligibility
65 Years and older · Female only
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2005
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 28, 2008 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Effects of Soy Isoflavones on Menopausal Hot Flashes

NCT00179556
View directory record Official record
Conditions
Menopausal Symptoms
Interventions
Isoflavone supplement
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
38 Years to 65 Years · Female only
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2005
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 13, 2017 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Not applicable Interventional

Effect of Revival Soy on Fibromyalgia Pain

NCT00279942
View directory record Official record
Conditions
Fibromyalgia
Interventions
Soy, Placebo
Dietary Supplement · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 76 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 5, 2012 · Synced Sep 3, 2026, 5:26 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Prandial Metabolic Phenotyping in Sarcopenic Older Adults Comparing Plant Based and Whey Based Protein

NCT06628349
View directory record Official record
Conditions
Protein Metabolism
Interventions
Whey Protein Isolate 90%, Soy Protein Isolate (90% Protein), Organic Pea Protein Isolate, Placebo (Water)
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
50 Years to 95 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Using Soy Estrogens to Prevent Bone Loss and Other Menopausal Symptoms

NCT00076050
View directory record Official record
Conditions
Menopause, Osteoporosis, Osteopenia
Interventions
Soy isoflavones, Placebo
Dietary Supplement
Lead sponsor
University of Miami
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
248 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 5, 2016 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2 Interventional Results available

Vitamin D and Soy Supplements in Treating Patients With Recurrent Prostate Cancer

NCT00499408
View directory record Official record
Conditions
Prostate Cancer
Interventions
Vitamin D, soy
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 1 Interventional

Soy Isoflavone in Combination With Radiation Therapy and Cisplatin in SCC of the Head and Neck

NCT02075112
View directory record Official record
Conditions
Cancer of Head and Neck
Interventions
Soy isoflavone, Radiation, Cisplatin
Drug · Radiation
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 5, 2019 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Not applicable Interventional

Modification of Asthma With Soy Isoflavone

NCT00741208
View directory record Official record
Conditions
Asthma
Interventions
Soy Isoflavone
Dietary Supplement
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 7, 2011 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2 Interventional

Isoflavones and Acute-phase Response in Chronic Renal Failure

NCT00029796
View directory record Official record
Conditions
Kidney Failure, Chronic
Interventions
soy isoflavones
Drug
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
18 Years to 70 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2003
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Mar 21, 2013 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2 Interventional

The Specific Role of Isoflavones in Reducing Prostate Cancer Risk

NCT00617617
View directory record Official record
Conditions
Prostate Cancer
Interventions
Prevastein HC®, Placebo
Dietary Supplement · Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
50 Years to 80 Years · Male only
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Sep 23, 2012 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Not applicable Interventional

Soy Isoflavones in Treating Patients With Recurrent Prostate Cancer or Rising Prostate-Specific Antigen

NCT01682941
View directory record Official record
Conditions
Recurrent Prostate Cancer, Stage IV Prostate Cancer
Interventions
Arm I Soy Bread, Arm II Soy-Almond Bread
Dietary Supplement
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
Male only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 21, 2023 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Concord Grape Polyphenol-soy Protein Isolate Complex (GP-SPI) on Gut Microbiota

NCT04018066
View directory record Official record
Conditions
Mechanisms, Defense
Interventions
GP-SPI
Dietary Supplement
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 35 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 17, 2026 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Women's Isoflavone Soy Health (WISH) Trial

NCT00118846
View directory record Official record
Conditions
Atherosclerosis
Interventions
25 gm soy protein supplement, Placebo
Dietary Supplement · Other
Lead sponsor
University of Southern California
Other
Eligibility
30 Years and older · Female only
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 3, 2026, 5:26 AM EDT
Completed No phase listed Observational

Effects of Infant Diets on Estrogen Activity and Development

NCT00340652
View directory record Official record
Conditions
Hormone
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
Up to 1 Year
Enrollment
157 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2012
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2 Interventional

Soy Isoflavones in Treating Patients Who Are Undergoing Radical Prostatectomy for Stage I or Stage II Adenocarcinoma of the Prostate

NCT00078923
View directory record Official record
Conditions
Prostate Cancer
Interventions
soy isoflavones, neoadjuvant therapy, Placebo
Dietary Supplement · Procedure · Other
Lead sponsor
Barbara Ann Karmanos Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2010
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 4, 2014 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Not applicable Interventional

High-protein Oral Supplement Improves Normalized Protein Catabolic Rate and Inflammation Markers

NCT05227755
View directory record Official record
Conditions
Renal Failure, Chronic Kidney Disease Requiring Chronic Dialysis
Interventions
Soy protein isolate, Whey protein isolate
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 9, 2024 · Synced Sep 3, 2026, 5:26 AM EDT
Withdrawn Not applicable Interventional

Effect of Soy Intake on Cardiovascular Disease Biomarkers in Subclinical Hypothyroid Participants

NCT02024906
View directory record Official record
Conditions
Cardiovascular Disease, Subclinical Hypothyroid
Interventions
soy protein isolate (SPI), milk protein isolate (MPI)
Dietary Supplement
Lead sponsor
Jill Hamilton-Reeves, PhD RD LD
Other
Eligibility
25 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 22, 2015 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Not applicable Interventional Results available

Dietary Supplementation With Soy Isoflavones in Asthma

NCT00277446
View directory record Official record
Conditions
Asthma
Interventions
Soy isoflavones
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 50 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 24, 2011 · Synced Sep 3, 2026, 5:26 AM EDT
Completed Phase 2 Interventional

Soy Supplements in Treating Patients Undergoing Surgery for Localized Prostate Cancer

NCT00345813
View directory record Official record
Conditions
Prostate Cancer
Interventions
soy isoflavones, soy protein isolate, placebo
Dietary Supplement · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 120 Years · Male only
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 9, 2018 · Synced Sep 3, 2026, 5:26 AM EDT
Completed No phase listed Observational

Study of Infant Diets on Estrogen Activity and Development

NCT00340665
View directory record Official record
Conditions
Infant Formula, Estrogen Activity
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
Up to 1 Year
Enrollment
239 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2012
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 20, 2019 · Synced Sep 3, 2026, 5:26 AM EDT