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Showing 1–24 of 26 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Isoflavone supplement Clear all
Completed Phase 2 Interventional

Soy Protein Supplement In Treating Hot Flashes in Postmenopausal Women Receiving Tamoxifen for Breast Disease

NCT00031720
View directory record Official record
Conditions
Breast Cancer, Hot Flashes, Hot Flushes
Interventions
soy protein, isoflavones, Tamoxifen, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older · Female only
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2013
U.S. locations
14
States / cities
Rockford, Illinois • Elkhart, Indiana • Kokomo, Indiana + 9 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2016 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

RCT of a Polyherbal Dietary Supplement for Prediabetes

NCT03388762
View directory record Official record
Conditions
Prediabetic State
Interventions
GlucoSupreme™ Herbal, Placebo
Dietary Supplement · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
4
States / cities
Baltimore, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 27, 2022 · Synced Sep 23, 2026, 2:09 PM EDT
Terminated Phase 3 Interventional Results available

Soy Protein/Effexor Hormone Therapy for Prostate Cancer

NCT00354432
View directory record Official record
Conditions
Hot Flashes, Prostate Cancer
Interventions
oral soy protein/isoflavones powder, Venlafaxine, Placebo Powder, Placebo Pill
Dietary Supplement · Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
21 Years and older · Male only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
20
States / cities
Newark, Delaware • Chicago, Illinois • Decatur, Illinois + 15 more
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Sep 23, 2026, 2:09 PM 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 23, 2026, 2:09 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Effects of Soy Compounds on Breast Cancer, Prostate Cancer, and Bone Health

NCT00200824
View directory record Official record
Conditions
Breast Cancer, Prostate Cancer
Interventions
Soy Isoflavone Nutritional Supplements
Drug
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
Not listed
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2005
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 11, 2009 · Synced Sep 23, 2026, 2:09 PM 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 23, 2026, 2:09 PM 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 23, 2026, 2:09 PM EDT
Terminated Phase 2 Interventional Results available

Soy Derivatives for Control of Hot Flashes in Men on Androgen Deprivation Therapy

NCT00594620
View directory record Official record
Conditions
Prostate Cancer
Interventions
Flav-ein capsules, Placebo
Dietary Supplement · Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older · Male only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Feb 13, 2022 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Soy, Bone and Health in College Females

NCT00244478
View directory record Official record
Conditions
Osteoporosis, Obesity
Interventions
Soy Protein Dietary Supplement, Placebo
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 19 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 24, 2015 · Synced Sep 23, 2026, 2:09 PM 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 23, 2026, 2:09 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Soy Isoflavones For Inner City Infants At Risk For Asthma (SIRA) Study

NCT05667701
View directory record Official record
Conditions
Wheezing, Asthma in Children
Interventions
Soy isoflavone, matching placebo
Drug
Lead sponsor
Rajesh Kumar
Other
Eligibility
2 Months to 12 Months
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 20, 2025 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Not applicable Interventional

Clinical Study Examining Use of an Over-the-Counter Supplement for the Prevention of Menstrually-Associated Migraine Headache

NCT00203255
View directory record Official record
Conditions
Migraine Headache
Interventions
Soy Isoflavones
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
Female only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 22, 2009 · Synced Sep 23, 2026, 2:09 PM EDT
Not yet recruiting Phase 1Phase 2 Interventional

Genes, Soy Isoflavones, and Virus

NCT07828405
View directory record Official record
Conditions
Wheezing
Interventions
Soy Isoflavone Nutritional Supplements
Drug
Lead sponsor
Ann & Robert H Lurie Children's Hospital of Chicago
Other
Eligibility
4 Months to 24 Months
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 17, 2026 · Synced Sep 23, 2026, 2:09 PM EDT
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 23, 2026, 2:09 PM EDT
Completed Phase 3 Interventional Results available

Role of Soy Supplementation in Prostate Cancer Development

NCT00255125
View directory record Official record
Conditions
Prostate Neoplasm
Interventions
Soy Supplement, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older · Male only
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2009
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 17, 2019 · Synced Sep 23, 2026, 2:09 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Effect of Lycopene and Isoflavones on Glucose Metabolism

NCT01377961
View directory record Official record
Conditions
Metabolic Syndrome, Diabetes Mellitus, Non-Insulin-Dependent
Interventions
Randomized pills either containing combination of lycopene and isoflavones (dietary supplements) or Placebo to be taken for 12 weeks, Screening, OGTT, Anthropometrics and Blood pressure, Blood Drawing
Drug · Other
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 75 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
2
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 25, 2015 · Synced Sep 23, 2026, 2:09 PM EDT
Recruiting Phase 1Phase 2 Interventional

Soy Tomato Juice to Improve Outcomes in Pancreatitis

NCT07447687
View directory record Official record
Conditions
Recurrent Acute Pancreatitis, Chronic Pancreatitis
Interventions
Soy-tomato juice product, Will include a soy-tomato juice product to be consumed during the 4 week intervention phase. A total of about 12 ounces (administered in two small cans) of the juice will be consumed
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 80 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Soy Isoflavones Supplementation in Treating Women at High Risk For or With Breast Cancer

NCT01219075
View directory record Official record
Conditions
BRCA1 Mutation Carrier, BRCA2 Mutation Carrier, Ductal Breast Carcinoma in Situ, Lobular Breast Carcinoma in Situ, Stage IA Breast Cancer, Stage IB Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer
Interventions
soy isoflavones, placebo, questionnaire administration, magnetic resonance imaging, biopsy, immunohistochemistry staining method, laboratory biomarker analysis, mammography
Dietary Supplement · Other · Procedure
Lead sponsor
University of Southern California
Other
Eligibility
30 Years to 75 Years · Female only
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 17, 2023 · Synced Sep 23, 2026, 2:09 PM 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 23, 2026, 2:09 PM 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 23, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Red Clover Botanical Dietary Supplements - Metabolism and Safety in Women

NCT03205787
View directory record Official record
Conditions
Food-drug Interaction
Interventions
Trifolium pratense
Dietary Supplement
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
40 Years to 79 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 5, 2021 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Soy as an Innovative Dietary Component in Abdominal Obesity Management Amongst Peri- and Early Menopausal Women

NCT02375113
View directory record Official record
Conditions
Central Obesity
Interventions
soy supplementation
Dietary Supplement
Lead sponsor
The University of Texas at San Antonio
Other
Eligibility
45 Years to 60 Years · Female only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated May 9, 2024 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Phase 2 Interventional

Soy Protein Supplement in Preventing Prostate Cancer in Patients With Elevated Prostate-Specific Antigen Levels

NCT00031746
View directory record Official record
Conditions
Prostate Cancer
Interventions
soy protein isolate, casein proteins
Dietary Supplement
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
50 Years and older · Male only
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2006
U.S. locations
5
States / cities
Washington D.C., District of Columbia • Syracuse, New York • Winston-Salem, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2016 · Synced Sep 23, 2026, 2:09 PM EDT
Completed Phase 2 Interventional Results available

Study of Genistein in Reducing Side Effects of Superficial Bladder Cancer Treatment

NCT01489813
View directory record Official record
Conditions
Bladder Cancer
Interventions
Genistein, Sugar pill
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
3
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 4, 2025 · Synced Sep 23, 2026, 2:09 PM EDT