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Showing 1–24 of 283 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Calcium Metabolism Disorders Clear all
Completed Phase 1Phase 2 Interventional

The Effect of Oral Niacinamide on Plasma Phosphorus Levels in Peritoneal Dialysis Patients

NCT00508885
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Niacinamide, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
17 participants
Timeline
2006 – 2007
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 29, 2007 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Estimate the Effect of Formulation on the Relative Absorption of SB-751689 Administered to Healthy Women

NCT00540878
View directory record Official record
Conditions
Osteoporosis
Interventions
SB-751689 oral tablets (400 mg)
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
40 Years to 65 Years · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2007
U.S. locations
1
States / cities
Port Orange, Florida
Source: ClinicalTrials.gov public record
Updated May 17, 2009 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 3 Interventional

EPIC(Effect of PhosLo on Phosphorus Levels in Chronic Kidney Disease)

NCT00211978
View directory record Official record
Conditions
Hyperphosphatemia, Kidney Failure
Interventions
calcium acetate, placebo
Drug
Lead sponsor
Nabi Biopharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 7, 2008 · Synced Jul 21, 2026, 10:24 AM EDT
Recruiting Phase 4 Interventional

Calcitonin Pre-treatment to Improve SPECT-CT Sensitivity

NCT03935984
View directory record Official record
Conditions
Primary Hyperparathyroidism, Hypercalcemia
Interventions
Calcitonin
Drug
Lead sponsor
Joseph Sferra
Other
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Toledo, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Jul 21, 2026, 10:24 AM EDT
Active, not recruiting Not applicable Interventional

Randall's Plaque Study: Pathogenesis and Relationship to Nephrolithiasis

NCT00169806
View directory record Official record
Conditions
Nephrocalcinosis, Renal Calculi, Hypercalciuria, Hyperparathyroidism, Cystinuria
Interventions
videotape for mapping of renal anatomy and papillary biopsy
Other
Lead sponsor
Indiana Kidney Stone Institute
Other
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2025
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jan 22, 2025 · Synced Jul 21, 2026, 10:24 AM EDT
Completed No phase listed Observational

Renal Osteodystrophy: A Fresh Approach

NCT00859612
View directory record Official record
Conditions
Renal Osteodystrophy
Interventions
Not listed
Lead sponsor
Hartmut Malluche, MD
Other
Eligibility
18 Years and older
Enrollment
464 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 4, 2017 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Pilot Study: The Effect of Ergocalciferol on Plasma Mucin-1 Levels

NCT03747523
View directory record Official record
Conditions
Ergocalciferol
Interventions
Ergocalciferol
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 28, 2020 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Not applicable Interventional

Iron Therapy for Autosomal Dominant Hypophosphatemic Rickets: A Pilot Project.

NCT02233322
View directory record Official record
Conditions
Autosomal Dominant Hypophosphatemic Rickets
Interventions
Iron
Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
25 Months and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Nov 13, 2019 · Synced Jul 21, 2026, 10:24 AM EDT
Completed No phase listed Observational

Preterm Infants and Nephrocalcinosis

NCT02438267
View directory record Official record
Conditions
Prematurity, Nephrocalcinosis, Hypercalciuria
Interventions
Not listed
Lead sponsor
University of Utah
Other
Eligibility
Up to 2 Weeks
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated Mar 12, 2017 · Synced Jul 21, 2026, 10:24 AM EDT
Active, not recruiting Not applicable Interventional

Mammography and Breast Arterial Calcification: An Information-Sharing Trial

NCT04983875
View directory record Official record
Conditions
Mammography, Vascular Calcification
Interventions
BAC-Enhanced Letter, Waitlist Control
Behavioral
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
40 Years and older · Female only
Enrollment
5,492 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Calcium Supplementation for a Healthy Weight-Lite (CaSHeW Lite)

NCT00386672
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Reduced energy (lite) OJ fortified with Calcium and Vitamin D, Nutrition Counseling, Reduced energy (lite) OJ without Calcium and Vitamin D
Dietary Supplement · Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 9, 2017 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Does Omeprazole Decrease Intestinal Calcium Absorption?

NCT00582972
View directory record Official record
Conditions
Osteoporosis, Achlorhydria, GERD, Hip Fracture
Interventions
Omeprazole
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 14, 2013 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 1Phase 2 Interventional

Treatment of Psoriasis With Parathyroid Hormone

NCT00007306
View directory record Official record
Conditions
Plaque Psoriasis
Interventions
Parathyroid hormone ointment
Drug
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2005
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 3, 2007 · Synced Jul 21, 2026, 10:24 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Efficacy of Intralesional Sodium Thiosulfate Versus Intralesional Saline for Dystrophic and Idiopathic Calcinosis Cutis

NCT03639779
View directory record Official record
Conditions
Calcinosis Cutis
Interventions
Sodium Thiosulfate, Saline Solution
Drug · Other
Lead sponsor
University of Central Florida
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jun 30, 2021 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children

NCT01050387
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Vitamin D
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
6 Months to 6 Years
Enrollment
193 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 4, 2014 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 3 Interventional

Cinacalcet to Treat Familial Primary Hyperparathyroidism

NCT00325104
View directory record Official record
Conditions
Hypercalcemia, Familial Primary Hyperparathyroidism
Interventions
Parathyroid hormone testing, Serum calcium testing
Procedure
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 2 Interventional Results available

Burosumab for Fibroblast Growth Factor-23 Mediated Hypophosphatemia in Fibrous Dysplasia

NCT05509595
View directory record Official record
Conditions
Fibrous Dysplasia Of Bone
Interventions
Burosumab
Drug
Lead sponsor
National Institute of Dental and Craniofacial Research (NIDCR)
NIH
Eligibility
1 Year to 99 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 1, 2026 · Synced Jul 21, 2026, 10:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vitamin D Deficiency in Elderly African American Women in Central Texas

NCT01971411
View directory record Official record
Conditions
Vitamin D Deficiency, Osteoporosis, Osteopenia
Interventions
Calcium 500mg with 200 IU Vitamin D - 2 tablets daily, Blood levels of Vitamin D, Serum CTX, Mg, Ca++ and iPTH, Usual sun exposure documentation, Dietary intake of calcium, vitamin D, magnesium
Drug · Procedure · Behavioral
Lead sponsor
McLennan County Medical Education and Research Foundation
Other
Eligibility
70 Years and older · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Jul 21, 2026, 10:24 AM EDT
Completed No phase listed Observational

Cardiovascular Mortality Associated With Abnormal Calcium Metabolism

NCT00018395
View directory record Official record
Conditions
Cardiovascular Disease, Kidney Disease
Interventions
Not listed
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2002
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 20, 2009 · Synced Jul 21, 2026, 10:24 AM EDT
Recruiting Phase 1Phase 2 Interventional

A First-in-human Study of KK8123 in Adults With X-linked Hypophosphatemia

NCT06525636
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
KK8123
Drug
Lead sponsor
Kyowa Kirin Co., Ltd.
Industry
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
5
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Jul 21, 2026, 10:24 AM EDT
Terminated Phase 2 Interventional Results available

Studies With 1,25-Dihydroxycholecalciferol

NCT00001151
View directory record Official record
Conditions
Hypocalcemia, Rickets
Interventions
1,25-Dihydroxycholecalciferol
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1976 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Jul 21, 2026, 10:24 AM EDT
Not yet recruiting Phase 2 Interventional

Reducing Inflammation to Improve Vascular and Bone Outcomes With Low-dose Colchicine in CKD

NCT07654231
View directory record Official record
Conditions
Chronic Kidney Disease Mineral and Bone Disorder, Hypertension, Diabetes, Dyslipidemia, Atherosclerotic Cardiovascular Disease (ASCVD), Chronic Kidney Disease (Stage 3)
Interventions
Low-dose Colchicine at 0.5mg daily, Usual Care
Drug · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 69 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Jul 21, 2026, 10:24 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Etelcalcetide (AMG 416) in the Treatment of Secondary Hyperparathyroidism (SHPT) in Patients With Chronic Kidney Disease on Hemodialysis

NCT01785849
View directory record Official record
Conditions
Hyperparathyroidism, Secondary
Interventions
Etelcalcetide, Placebo
Drug
Lead sponsor
Amgen
Industry
Eligibility
18 Years to 100 Years
Enrollment
508 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
51
States / cities
Birmingham, Alabama • Pine Bluff, Arkansas • Azusa, California + 44 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2019 · Synced Jul 21, 2026, 10:24 AM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

Advanced Ultrasound Signal Processing of Suspicious Breast Images

NCT07206888
View directory record Official record
Conditions
Breast Cancer, Breast Cyst, Microcalcification
Interventions
Imaging
Diagnostic Test
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older · Female only
Enrollment
252 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2037
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced Jul 21, 2026, 10:24 AM EDT