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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Ascorbate Clear all
Completed Phase 2 Interventional Results available

A Phase 2 Trial of High-dose Ascorbate for Pancreatic Cancer (PACMAN 2.1)

NCT02905578
View directory record Official record
Conditions
Pancreatic Neoplasms, Cancer of Pancreas, Cancer of the Pancreas, Neoplasms, Pancreatic, Pancreas Cancer, Pancreas Neoplasms, Adenocarcinoma
Interventions
Gemcitabine, nab-paclitaxel, Pharmacological ascorbate
Drug
Lead sponsor
University of Iowa
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Withdrawn Phase 2 Interventional

A Clinical Trial Evaluating the Effect of Pharmacological Ascorbate on Radiation Therapy for Pancreatic Cancer Patients

NCT03541486
View directory record Official record
Conditions
Pancreatic Neoplasm
Interventions
Ascorbate, Gemcitabine, radiation therapy
Drug · Radiation
Lead sponsor
Joseph J. Cullen, MD, FACS
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 9, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Phase 2 Interventional Results available

Pharmacological Ascorbate for Lung Cancer

NCT02420314
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
Paclitaxel, Carboplatin, Ascorbic Acid
Drug
Lead sponsor
Joseph J. Cullen, MD, FACS
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Phase 1 Interventional

A Phase I Trial of High-Dose Ascorbate in Glioblastoma Multiforme

NCT01752491
View directory record Official record
Conditions
Glioblastoma, GBM, Glioblastoma Multiforme
Interventions
Ascorbate, Temozolomide, Radiation therapy
Drug · Radiation
Lead sponsor
Joseph J. Cullen, MD, FACS
Other
Eligibility
18 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Sep 21, 2026, 7:03 AM EDT
Terminated Phase 1 Interventional

Ascorbate With Durvalumab in Non-Small Cell Lung Cancer (NSCLC)

NCT06083454
View directory record Official record
Conditions
Non-small Cell Lung Cancer
Interventions
Durvalumab, Pharmacological ascorbate, Surgery (SOC)
Drug · Procedure
Lead sponsor
William Zeitler
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Terminated Phase 2 Interventional Results available

Gemcitabine Plus Ascorbate for Sarcoma in Adults

NCT03468075
View directory record Official record
Conditions
Sarcoma, Soft Tissue Sarcoma, Unresectable Soft Tissue Sarcoma, Metastatic Bone Tumor, Bone Sarcoma
Interventions
Ascorbate, Gemcitabine
Drug
Lead sponsor
Mohammed Milhem, MBBS
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 9, 2020 · Synced Sep 21, 2026, 7:03 AM EDT
Recruiting Phase 1 Interventional

SHARON: A Clinical Trial for Metastatic Cancer Using Chemotherapy and Patients' Own Stem Cells

NCT04150042
View directory record Official record
Conditions
Pancreatic Adenocarcinoma Metastatic, BRCA1 Mutation, BRCA2 Mutation, Pancreatic Acinar Cell Carcinoma, Pancreatic Ductal Adenocarcinoma, Pancreatic Cancer, Metastatic Pancreatic Cancer, Metastatic Pancreatic Ductal Adenocarcinoma, Breast Cancer Metastatic, Breast Cancer Stage IV, Pancreatic Cancer Stage IV, HER2-negative Breast Cancer, HER2 Negative Breast Carcinoma, Adenocarcinoma of the Breast, PALB2 Gene Mutation, Pancreas Cancer, Metastatic, Pancreas Cancer, Recurrent, Pancreas Cancer, Stage IV Pancreatic Cancer, Stage 4 Pancreatic Cancer
Interventions
Melphalan, BCNU, Vitamin B12B, Vitamin C, Autologous Hematopoietic Stem Cells
Drug · Device
Lead sponsor
General Oncology, Inc.
Industry
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2028
U.S. locations
2
States / cities
Boston, Massachusetts • New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Terminated Phase 2 Interventional Results available

Assessing the Efficacy and Safety of IV Vitamin C in Combination With Standard Chemotherapy for Pancreatic Ca

NCT01555489
View directory record Official record
Conditions
Stage IV Pancreatic Cancer
Interventions
Ascorbic Acid
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 3, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Phase 1 Interventional

High Dose Ascorbic Acid for Plasma Cell Disorders

NCT03602235
View directory record Official record
Conditions
Multiple Myeloma
Interventions
Ascorbate, Melphalan
Other · Drug
Lead sponsor
Christopher Strouse
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Active, not recruiting Phase 1 Interventional

The Effects of ATLAS Therapy on Nitric Oxide Bioavailability in Patients With Intermittent Claudication

NCT04800692
View directory record Official record
Conditions
Claudication, Intermittent, Peripheral Artery Disease, Peripheral Vascular Diseases
Interventions
Tetrahydrobiopterin 10 mg/kg, Tetrahydrobiopterin 20 mg/kg, L-Ascorbate, L-Arginine
Drug
Lead sponsor
Louis Messina
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Withdrawn Early Phase 1 Interventional

Gemcitabine With Ascorbate Including Adolescents

NCT04877587
View directory record Official record
Conditions
Soft Tissue Sarcoma, Bone Sarcoma, Unresectable Soft Tissue Sarcoma, Metastatic Bone Sarcoma, Metastatic Soft-tissue Sarcoma, Unresectable Bone Sarcoma
Interventions
Ascorbate, Gemcitabine
Drug
Lead sponsor
David Dickens
Other
Eligibility
13 Years to 17 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 21, 2023 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Phase 1 Interventional

The Body's Affect on Vitamin C

NCT00001309
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Vitamin C
Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 35 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 7, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Active, not recruiting Early Phase 1 Interventional

Gemcitabine Plus Ascorbate for Sarcoma in Adults (Pilot)

NCT04634227
View directory record Official record
Conditions
Sarcoma, Soft Tissue Sarcoma, Unresectable Soft Tissue Sarcoma, Metastatic Bone Tumor, Bone Sarcoma
Interventions
Ascorbate
Drug
Lead sponsor
University of Iowa
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

: Vascular Function in Health and Disease

NCT02966665
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Pulmonary Artery Hypertension, Heart Failure, Hypertension
Interventions
Maximum Exercise Tests, BH4, L-NMMA, Vitamin C, Vitamin E, α-Lipoic Acid and L-Ascorbate, BQ-123, Fexofenadine, Ranitidine, Angiotensin-II, Valsartan, Acetylcholine, Sodium Nitroprusside, Angiotensin-II, Norepinephrine, Phentolamine, BQ-123, MitoQ, BH4
Other · Drug
Lead sponsor
Russell Richardson
Other
Eligibility
18 Years and older
Enrollment
420 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2026
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Oxidative Stress in Microvascular Dysfunction Following Gestational Diabetes

NCT05946785
View directory record Official record
Conditions
Gestational Diabetes, Vascular Endothelial Function
Interventions
Acetylcholine, insulin aspart
Drug
Lead sponsor
Anna Stanhewicz, PhD
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Phase 2Phase 3 Interventional Results available

A Pilot Study of Oxaloacetate in Subjects With Treated PD

NCT01741701
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Oxaloacetate (OAA), Placebo
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
30 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 16, 2016 · Synced Sep 21, 2026, 7:03 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Research Study of IV Vitamin C in Combination With Irinotecan vs Irinotecan Alone for Advanced Colorectal CA

NCT01550510
View directory record Official record
Conditions
Stage IV Colorectal Cancer
Interventions
Ascorbic Acid, Irinotecan
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 5, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Not yet recruiting Phase 1Phase 2 Interventional

177Lu-DOTA-EB-TATE in Adult Patients With Metastatic, Radioactive Iodine Non-Responsive Oncocytic (Hurthle-Cell) Thyroid Cancer

NCT06991738
View directory record Official record
Conditions
Thyroid Cancer
Interventions
68Ga-DOTA-TATE PET Scan, Amino acid infusions, 177Lu-DOTA-EB-TATE
Diagnostic Test · Other · Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 100 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2032
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 17, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Prospective Study of Topical Vitamin C (THDA) Versus Topical Vitamin C (THDA) With Acetyl Zingerone

NCT05779280
View directory record Official record
Conditions
Wrinkle, Skin Pigmentation
Interventions
THDA + Acetyl Zingerone Topical Product, THDA
Other
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
30 Years to 65 Years
Enrollment
44 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 21, 2026, 7:03 AM EDT
Terminated Phase 2 Interventional Results available

Phase II Study of PARP Inhibitor Olaparib and IV Ascorbate in Castration Resistant Prostate Cancer

NCT05501548
View directory record Official record
Conditions
Prostate Cancer, Castration-resistant Prostate Cancer
Interventions
Olaparib, Vitamin C
Drug · Dietary Supplement
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older · Male only
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Recruiting Phase 2 Interventional

Ascorbate in Myelodysplastic Syndrome

NCT07283900
View directory record Official record
Conditions
Myelodysplastic Syndromes
Interventions
High-dose ascorbate, Azacitidine
Drug
Lead sponsor
Prajwal Dhakal
Other
Eligibility
18 Years to 99 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 15, 2026 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Phase 1 Interventional

Gemcitabine, Ascorbate, Radiation Therapy for Pancreatic Cancer, Phase I

NCT01852890
View directory record Official record
Conditions
Pancreatic Neoplasms
Interventions
Ascorbate, Gemcitabine, Radiation therapy
Drug · Radiation
Lead sponsor
Joseph J. Cullen
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Oct 23, 2025 · Synced Sep 21, 2026, 7:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Diesel Exhaust Particulate Exposures on Endothelial Function in Humans

NCT00434005
View directory record Official record
Conditions
Healthy
Interventions
N-acetylcysteine, ascorbate, Placebo
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 49 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 15, 2013 · Synced Sep 21, 2026, 7:03 AM EDT
Recruiting Phase 1 Interventional

High-dose Ascorbate (HDA) in Combination With Standard of Care Azacitidine and Venetoclax in Acute Myeloid Leukemia (AML)

NCT07177079
View directory record Official record
Conditions
Acute Myeloid Leukemia
Interventions
Azacitidine, Venetoclax, High-dose ascorbate, Decitabine
Drug
Lead sponsor
Kittika Poonsombudlert
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 21, 2026, 7:03 AM EDT