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| Withdrawn | 14 |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 1 to 25 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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