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Showing 1–24 of 101 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Calcium Deficiency Clear all
Withdrawn Not applicable Interventional Accepts healthy volunteers

Calcimimetics in Hypophosphatemic Rickets

NCT00844740
View directory record Official record
Conditions
Familial Hypophosphatemic Rickets
Interventions
Cinacalcet
Drug
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
5 Years to 21 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

How Does Magnesium Status Influence Calcium Homeostasis?

NCT01593501
View directory record Official record
Conditions
Magnesium Deficiency, Calcium Metabolism Disorders
Interventions
vitamin D3
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
30 Years to 75 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 31, 2016 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 1 Interventional

A Study of KRN23 in X-linked Hypophosphatemia

NCT00830674
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
Placebo, KRN23
Drug
Lead sponsor
Kyowa Kirin Co., Ltd.
Industry
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
4
States / cities
New Haven, Connecticut • Indianapolis, Indiana • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 16, 2024 · Synced Sep 7, 2026, 1:32 PM EDT
Active, not recruiting No phase listed Observational

X-linked Hypophosphatemia Disease Monitoring Program

NCT03651505
View directory record Official record
Conditions
X-linked Hypophosphatemia, Hypophosphatemic Rickets
Interventions
No intervention
Other
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
Not listed
Enrollment
782 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2032
U.S. locations
24
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 18 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Not applicable Interventional

Identifying Vitamin D Deficiency in Very Low Birth Weight Infant (VLBW) Infants Part 2

NCT01363167
View directory record Official record
Conditions
Infant, Very Low Birth Weight, Calcium Deficiency, Vitamin D Deficiency
Interventions
400 IU Cholecalciferol- Vitamin D Daily
Dietary Supplement
Lead sponsor
Medical University of South Carolina
Other
Eligibility
1 Day to 3 Days
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
2
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 23, 2014 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Interactions Between HIV Protease Inhibitors and Calcium Channel Blockers

NCT00039975
View directory record Official record
Conditions
HIV Infections, Cardiovascular Diseases, Hypertension
Interventions
Indinavir sulfate, Ritonavir, Amlodipine, Diltiazem HCl
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 60 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Ends 2004
U.S. locations
9
States / cities
San Francisco, California • Stanford, California • Denver, Colorado + 6 more
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Calcium-fortified Cereal Bars on Dietary Calcium Intake in Women

NCT01508689
View directory record Official record
Conditions
Calcium Deficiency
Interventions
Receive Kellogg's Nutri-Grain® cereal bars first, Receive Kellogg's Nutri-Grain® cereal bars second
Behavioral
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 18, 2015 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Not applicable Interventional

A Study to Assess Metabolic Bone Disease of Prematurity Using an Acoustic Method

NCT04752098
View directory record Official record
Conditions
Metabolic Bone Disease, Osteopenia, Neonatal Rickets
Interventions
Vibro-acoustic analysis (VAA), based on ultrasound radiation force
Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
3 Days to 8 Months
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 26, 2025 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 2 Interventional Results available

Study of the Safety, Pharmacodynamics (PD) and Efficacy of KRN23 in Children From 1 to 4 Years Old With X-linked Hypophosphatemia (XLH)

NCT02750618
View directory record Official record
Conditions
X-Linked Hypophosphatemia
Interventions
Burosumab
Biological
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
1 Year to 4 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
3
States / cities
New Haven, Connecticut • Indianapolis, Indiana • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 5, 2024 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 1Phase 2 Interventional Results available

A Repeated Study of KRN23 in Adults With X-Linked Hypophosphatemia

NCT01340482
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
KRN23
Drug
Lead sponsor
Kyowa Kirin Co., Ltd.
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
5
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 17, 2024 · Synced Sep 7, 2026, 1:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study to Assess the Use of a Simple Lab Test to Screen for Rickets in Children

NCT00502866
View directory record Official record
Conditions
Rickets
Interventions
Not listed
Lead sponsor
Agency for Healthcare Research and Quality (AHRQ)
Federal
Eligibility
6 Months to 15 Months
Enrollment
246 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 7, 2014 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Calcium Study

NCT00857831
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Vitamin D and Calcium
Dietary Supplement
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2012 · Synced Sep 7, 2026, 1:32 PM 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 Sep 7, 2026, 1:32 PM 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 Sep 7, 2026, 1:32 PM EDT
Completed Not applicable Interventional

Vitamin D Supplementation in Older Women

NCT00472823
View directory record Official record
Conditions
Osteoporosis, Aging
Interventions
Vitamin D3, Calcium Citrate (Citracal)
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
57 Years and older · Female only
Enrollment
273 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 13, 2016 · Synced Sep 7, 2026, 1:32 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Phosphorus Absorption in Healthy Adults and in Patients With Moderate Chronic Kidney Disease

NCT03108222
View directory record Official record
Conditions
Chronic Kidney Disease Mineral and Bone Disorder
Interventions
Phosphorus Absorption Test
Other
Lead sponsor
Purdue University
Other
Eligibility
30 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 9, 2019 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 4 Interventional

Vitamin D Deficiency in Chronic Kidney Disease (CKD) Patients

NCT00958451
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Paricalcitol, Ergocalciferol
Drug
Lead sponsor
Salem Veterans Affairs Medical Center
Federal
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Salem, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 23, 2011 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 2 Interventional Results available

Extension Study of Protocol ENB-002-08 - Study of Asfotase Alfa in Infants and Young Children With Hypophosphatasia (HPP)

NCT01205152
View directory record Official record
Conditions
Hypophosphatasia
Interventions
asfotase alfa
Biological
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
24 Weeks to 42 Months
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2016
U.S. locations
5
States / cities
Wilmington, Delaware • Springfield, Missouri • Omaha, Nebraska + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 2 Interventional Results available

Study of KRN23 (Burosumab), a Recombinant Fully Human Monoclonal Antibody Against Fibroblast Growth Factor 23 (FGF23), in Pediatric Subjects With X-linked Hypophosphatemia (XLH)

NCT02163577
View directory record Official record
Conditions
X-linked Hypophosphatemia
Interventions
burosumab
Biological
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
5 Years to 12 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
4
States / cities
San Francisco, California • New Haven, Connecticut • Indianapolis, Indiana + 1 more
Source: ClinicalTrials.gov public record
Updated May 5, 2024 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 3 Interventional

Open Label Trial Assessing Safety and Efficacy of Burosumab (KRN23), in a Patient With ENS and Hypophosphatemic Rickets

NCT03581591
View directory record Official record
Conditions
Hypophosphatemia, Hypophosphatemic Rickets, Pain, Chronic
Interventions
Burosumab
Biological
Lead sponsor
Redwood Dermatology Sciences
Other
Eligibility
Up to 18 Years · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Clinton, Utah
Source: ClinicalTrials.gov public record
Updated Jan 17, 2020 · Synced Sep 7, 2026, 1:32 PM EDT
Not listed Phase 1Phase 2 Interventional Results available

Liposomal Irinotecan, Fluorouracil, Leucovorin Calcium, and Rucaparib in Treating Patients With Metastatic Pancreatic, Colorectal, Gastroesophageal, or Biliary Cancer

NCT03337087
View directory record Official record
Conditions
Metastatic Biliary Tract Carcinoma, Metastatic Colorectal Carcinoma, Metastatic Gastroesophageal Junction Adenocarcinoma, Metastatic Malignant Digestive System Neoplasm, Metastatic Pancreatic Adenocarcinoma, Stage IV Colorectal Cancer AJCC v7, Stage IV Pancreatic Cancer AJCC v6 and v7, Stage IVA Colorectal Cancer AJCC v7, Stage IVB Colorectal Cancer AJCC v7
Interventions
Fluorouracil, Irinotecan Sucrosofate, Laboratory Biomarker Analysis, Leucovorin Calcium, Rucaparib
Drug · Other
Lead sponsor
Academic and Community Cancer Research United
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
3
States / cities
Scottsdale, Arizona • Atlanta, Georgia • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 16, 2024 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Not applicable Interventional Results available

Calcium and Phosphorus Whole-Body Balance and Kinetics in Patients With Moderate Chronic Kidney Disease

NCT04019379
View directory record Official record
Conditions
Phosphorus and Calcium Disorders, Chronic Kidney Disease Mineral and Bone Disorder, Chronic Kidney Diseases
Interventions
High Phosphorus Diet, Low Phosphorus Diet
Other
Lead sponsor
University of Minnesota
Other
Eligibility
30 Years to 75 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 7, 2026, 1:32 PM EDT
Completed Phase 1 Interventional

The Effect of Oral Niacinamide on Serum Phosphorus Levels in Hemodialysis Patients

NCT00316472
View directory record Official record
Conditions
Hyperphosphatemia
Interventions
Niacinamide
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 15, 2009 · Synced Sep 7, 2026, 1:32 PM EDT
Completed No phase listed Observational Results available

A Retrospective Study of the Natural History of Patients With Severe Perinatal and Infantile Hypophosphatasia (HPP)

NCT01419028
View directory record Official record
Conditions
Hypophosphatasia (HPP)
Interventions
Not listed
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
Not listed
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
5
States / cities
Los Angeles, California • Indianapolis, Indiana • St Louis, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 31, 2019 · Synced Sep 7, 2026, 1:32 PM EDT