Clinical Trials on Tetrahydrobiopterin Deficiency

Total 9046 results

United Arab Emirates University

Completed

Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens

Vitamin D Deficiency

United Arab Emirates
Milton S. Hershey Medical Center

Completed

Genetic, Dietary and Environmental Influences on Vitamin D Metabolism

Vitamin D Deficiency

United States
University of Wisconsin, Madison

Withdrawn

Evaluation of a Transdermal Vitamin D3 Delivery System, D3forME (D3forME)

Vitamin D Deficiency

United States
Guy's and St Thomas' NHS Foundation Trust

Completed

Vitamin D and Immunity: Photosynthesis Versus Supplementation (IMMUNI-D)

Vitamin D Deficiency
Charles Drew University of Medicine and Science
National Center for Research Resources (NCRR)

Completed

Effect of Vitamin D3 on Vascular Function

Vitamin D Deficiency
Virginia Polytechnic Institute and State University

Completed

Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes

Vitamin D Deficiency

United States
Medical University of South Carolina
Eunice Kennedy Shriver National Institute of Child Health and Human Development... and other collaborators

Completed

Establishing the Vitamin D Requirements During Lactation

Vitamin D Deficiency

United States
Universitaire Ziekenhuizen KU Leuven

Unknown

Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers

Vitamin D Deficiency

Belgium
Pontificia Universidad Catolica de Chile
Harvard Medical School (HMS and HSDM); Fuerza Aérea de Chile; Instituto Antártico...

Completed

Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants (AntarD)

Vitamin D Deficiency
King Faisal Specialist Hospital & Research Center

Withdrawn

Magnitude of Changes in 25 OH Vitamin D3 Levels After Vitamin D3 Supplementation

Vitamin D Deficiency

Saudi Arabia
Rockefeller University

Completed

The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile

Vitamin D Deficiency

United States
University of Surrey
Conselho Nacional de Desenvolvimento Científico e Tecnológico; Universidade...

Completed

Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Study) (D-SOL)

Vitamin D Deficiency

United Kingdom, Brazil
DongGuk University

Completed

Vitamin D Deficiency Still Growing

Vitamin D Deficiency
Imam Abdulrahman Bin Faisal University

Completed

Topical Delivery of Vitamin D3 as Vitamin D Supplementation

Vitamin D Deficiency

Saudi Arabia
Nancy Ahmed El Salmawy

Unknown

Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency.

Vitamin D Deficiency
Bangor University
University of East Anglia

Completed

Vitamin D Status and Immune Function

Vitamin D Deficiency

United Kingdom
Boston University

Completed

The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression

Vitamin D Deficiency

United States
Boston University

Completed

Availability of Vitamin D in Orange Juice

Vitamin D Deficiency

United States
Hospital for Special Surgery, New York

Completed

Vitamin D and Functional Outcomes After Total Hip Arthroplasty (THA)

Vitamin D Deficiency

United States
Novo Nordisk A/S

Completed

A Single Dose Trial in Healthy Caucasians and Japanese Subjects Investigating the Pharmacokinetics of Somatropin

Healthy | Growth Hormone Disorder | Adult Growth Hormone Deficiency

United States
University of Miami
Merck Sharp & Dohme LLC

Completed

Safety of Vitamin D Supplementation in Older Persons

Vitamin D Deficiency

United States
Umeå University
Region Skane

Completed

Comparing Different Amounts of Vitamin D Supplementation to Preschool Children Living in Northern and Southern Sweden (Dvisum)

Vitamin D Deficiency

Sweden
University Hospital Inselspital, Berne
Significantis GmbH

Completed

Prevalence and Consequences of Vitamin D Deficiency in Pregnant Women in Switzerland (PCVDDPWS)

Vitamin D Deficiency

Switzerland
Kwang Dong Pharmaceutical co., ltd.

Completed

A Prospective, Multi-center Study to Evaluate the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency

Vitamin D Deficiency
Meir Medical Center

Unknown

Empirical Comperative Study Of Variation Blood Level Antibody Vitamin D at Different Groups Of Patients Compared Healthy Peoples

Vitamin D Deficiency
Chinese Academy of Sciences

Completed

Vitamin D Intervention Trial in Healthy Chinese, Phase II

Vitamin D Deficiency

China
Chinese Academy of Sciences

Completed

Vitamin D Intervention Trial in Healthy Chinese

Vitamin D Deficiency

China
Medical University of Graz
European Union

Completed

Vitamin D and Mortality: an Individual Participant Data Meta-analysis of Standardized 25-hydroxyvitamin D

Vitamin D Deficiency

Austria
Fujirebio Diagnostics, Inc.

Completed

Study Vitamin D in Healthy Individuals

Vitamin D Deficiency

United States
Merck Sharp & Dohme LLC

Completed

A Study to Assess the Effectiveness of an Investigational Drug in Elderly Subjects With Low Vitamin D Levels (0822A-009)

Vitamin D Deficiency
Tufts University
Pfizer

Completed

A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption (MUFA/PUFA)

Vitamin D Deficiency

United States
Chinese Academy of Sciences

Completed

A Single High-dose Oral Supplement of Vitamin D in Young Chinese

Vitamin D Deficiency

China
USDA, Western Human Nutrition Research Center

Completed

Assessment of Vitamin D Supplementation and Immune Function (FL-82)

Vitamin D Deficiency

United States
University College Cork

Completed

Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults (VitD-Ca)

Vitamin D Deficiency

Ireland
Rambam Health Care Campus

Unknown

Bioavailability of Vitamin D Encapsulated in Casein Micelles, Compared to Its Bioavailability in a Synthetic Emulsifier Currently Used for Supplementation and Enrichment. (VD)

Vitamin D Deficiency

Israel
Ulrike Lehmann

Completed

Bioefficiency of of Conventional Fish and Vitamin D Fortified Fish

Vitamin D Deficiency

Germany
Eunice Kennedy Shriver National Institute of Child...

Completed

Prevention of Vitamin D Deficiency

Vitamin D Deficiency

United States
Ulrike Lehmann

Completed

Safety and Bioefficacy of Vitamin D2 and Vitamin D3

Vitamin D Deficiency
Massachusetts General Hospital
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Completed

Different Vitamin D Preparations & FGF23 in Humans

Vitamin D Deficiency

United States
Federal University of Rio Grande do Sul
Hospital de Clinicas de Porto Alegre; Conselho Nacional de Desenvolvimento...

Completed

The Effect of Fat on Vitamin D Absorption (VITD_100484)

Vitamin D Deficiency
Lund University

Completed

Alternative Treatments of Vitamin D Deficiency

Vitamin D Deficiency

Sweden
Nemours Children's Clinic

Completed

Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers

Vitamin D Deficiency

United States
Assaf-Harofeh Medical Center

Completed

Vitamin d Levels and Coronary Catheterization

Vitamin D Deficiency

Israel
Rambam Health Care Campus

Unknown

Interventional Trial of Vitamin D Deficiency in the Patients of General Departments

Vitamin D Deficiency

Israel
Eisai Co., Ltd.

Completed

The Role of Methycobalamin in Early Dementia Patients With Vitamin B12 Deficiency and Hyperhomocysteinaemia.

Dementia With Vitamin B12 Deficiency

China
University Medicine Greifswald

Completed

Evaluation of Protein Intake and Micronutrient Supplementation After Bariatric Surgery (BOP)

Obesity | Obesity, Morbid | Vitamin Deficiency | Protein Malnutrition | Trace Element Deficiency | Mineral Deficiency

Germany
Swiss Federal Institute of Technology
Jomo Kenyatta University of Agriculture and Technology

Completed

Iron and Vaccine Response

Iron Deficiency Anemia | Vaccine Preventable Disease | Iron Deficiency Anemia Treatment | Vaccine Response Impaired

Kenya
Pharmacosmos UK Ltd
BioStata

Completed

Time to Relapse of Iron Deficiency Anaemia After Standard Treatment With The Intravenous Iron (Monofer®)

Iron Deficiency Anaemia

United Kingdom
Frieda Wolf

Recruiting

Magnesium Deficiency In Patients Hospitalized in Internal Medicine Wards

Hypomagnesemia

Israel
University of Hohenheim

Completed

Sanitary Napkins for Urinary Assessment of Micronutrients

Focus: Nutritional Deficiency

Germany

Clinical Trials on Tetrahydrobiopterin Deficiency

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Czech Republic

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations