| Evaluating the Effect of SOLIUS UV Light Source in Improving Vitamin D Status (NCT04780776) | Boston University | 2022-02-23 |
| Solius UV Light Source in Improving Serum Levels of 25-hydroxyvitamin D (NCT04865432) | Boston University | 2021-08-24 |
| Efficacy and Safety of Calcifediol vs Placebo in Subjects With Vitamin D Deficiency (NCT04735926) | Faes Farma, S.A. | 2020-12-23 |
| Pharmacokinetics and Safety Study of CTAP101 Capsules in Japanese and Non-Japanese Healthy Subjects and Non-Japanese Healthy Subjects (NCT03660800) | OPKO Health, Inc. | 2018-08-20 |
| Repeated-dose Safety, Efficacy, Pharmacokinetic and Pharmacodynamic of CTAP101, Immediate-release Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With Secondary Hyperparathyroidism, Chronic Kidney Disease 3-4 and Vitamin D Insufficiency (NCT03588884) | OPKO Health, Inc. | 2018-06-08 |
| Gene Expression, Metabolomic, Microbiome, and Calcium Metabolism in Response to Varied Vitamin D Dosages (NCT02856776) | Boston University | 2017-12-01 |
| Vitamin D to Improve Nutrition Prior to Bariatric Surgery and Investigate the Relationship With Negative Outcomes (NCT02212652) | Johns Hopkins University | 2017-01-01 |
| The Effects of Serum Vitamin D and IVF Outcome (NCT02187146) | University of Birmingham | 2013-09-01 |
| Effect of Omega-3 Fatty Acid on Vitamin D Activation (NCT01596842) | Dong-A University | 2012-05-01 |
| D Vitamin Intervention in VA (NCT01375660) | US Department of Veterans Affairs | 2011-05-01 |
| Safety/Efficacy Study of CTAP101 in Chronic Kidney Disease Subjects With Secondary Hyperparathyroidism (SHPT) (NCT01219855) | OPKO Health, Inc. | 2010-10-01 |
| Vitamin D Homeostasis in Sarcoidosis (NCT03621553) | University of Texas Southwestern Medical Center | 2010-07-01 |
| Vitamin D Supplementation and Physical Function in Older Adults (NCT01179503) | Wake Forest University Health Sciences | 2010-01-01 |
| Seasonal Variations in Serum 25-hydroxy Vitamin-D Levels in a Swedish Cohort (NCT02136407) | Sahlgrenska University Hospital | 2009-10-01 |
| Metabolic Effects of Vitamin D in Patients With Type 2 Diabetes (NCT00812578) | University of Aarhus | 2008-12-01 |
| Trial to Assess Vitamin D Requirements in Lactating Women (NCT01349127) | University College Cork | 2008-08-01 |
| Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation (NCT00690417) | University of Wisconsin, Madison | 2007-08-01 |
| Vitamin D Levels and Vitamin D Education in Geriatric Patients (NCT00273611) | University of Colorado, Denver | 2005-12-01 |