Clinical trials
Vitamin D Deficiency trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
251 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2001 | 1 |
| 2004 | 2 |
| 2005 | 6 |
| 2006 | 9 |
| 2007 | 14 |
| 2008 | 16 |
| 2009 | 17 |
| 2010 | 34 |
| 2011 | 31 |
| 2012 | 19 |
| 2013 | 10 |
| 2014 | 10 |
| 2015 | 12 |
| 2016 | 11 |
| 2017 | 10 |
| 2018 | 9 |
| 2019 | 8 |
| 2020 | 7 |
| 2021 | 7 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 3 |
| 2026 | 2 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 184 |
| Terminated | 28 |
| Withdrawn | 14 |
| Unknown status | 9 |
| Recruiting | 7 |
| Active, not recruiting | 6 |
| Suspended | 1 |
| Not yet recruiting | 1 |
| Enrolling by invitation | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| University of Wisconsin, Madison | 13 |
| Massachusetts General Hospital | 10 |
| Creighton University | 9 |
| Boston University | 8 |
| Medical University of South Carolina | 7 |
| Children's Hospital Medical Center, Cincinnati | 5 |
| University of Alabama at Birmingham | 5 |
| Wake Forest University Health Sciences | 5 |
| Columbia University | 4 |
| Johns Hopkins University | 4 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Vitamin D Deficiency | 251 |
| Obesity | 23 |
| Insulin Resistance | 18 |
| Renal Insufficiency, Chronic | 13 |
| Cardiovascular Diseases | 8 |
| Hyperparathyroidism, Secondary | 8 |
| Diabetes Mellitus, Type 2 | 7 |
| Hyperparathyroidism | 7 |
| Hypertension | 7 |
| Diabetes Mellitus | 6 |
Trials
Showing 26 to 50 of 251. Each trial links to its page on Pharma Observatory.
151 more trials match. See them on Pharma Observatory
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
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