Clinical trials
Observational Vitamin D Deficiency trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
189 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2006 | 2 |
| 2007 | 2 |
| 2008 | 8 |
| 2009 | 5 |
| 2010 | 9 |
| 2011 | 7 |
| 2012 | 11 |
| 2013 | 6 |
| 2014 | 7 |
| 2015 | 17 |
| 2016 | 7 |
| 2017 | 13 |
| 2018 | 11 |
| 2019 | 10 |
| 2020 | 15 |
| 2021 | 12 |
| 2022 | 14 |
| 2023 | 3 |
| 2024 | 14 |
| 2025 | 7 |
| 2026 | 8 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 125 |
| Unknown status | 32 |
| Recruiting | 9 |
| Active, not recruiting | 7 |
| Not yet recruiting | 5 |
| Withdrawn | 4 |
| Terminated | 3 |
| Enrolling by invitation | 3 |
| Suspended | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Kanuni Sultan Suleyman Training and Research Hospital | 5 |
| Assiut University | 4 |
| Ain Shams University | 3 |
| Creighton University | 3 |
| Institute of Nutrition, Slovenia (Nutris) | 3 |
| National Taiwan University Hospital | 3 |
| Second Affiliated Hospital of Wenzhou Medical University | 3 |
| Ain Shams Maternity Hospital | 2 |
| Assistance Publique - Hôpitaux de Paris | 2 |
| Avera McKennan Hospital & University Health Center | 2 |
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 | 189 |
| Obesity | 14 |
| COVID-19 | 9 |
| Insulin Resistance | 9 |
| Osteoporosis | 8 |
| Diabetes Mellitus | 6 |
| Vitamin B 12 Deficiency | 6 |
| Folic Acid Deficiency | 5 |
| Inflammation | 5 |
| Asthma | 4 |
Trials
Showing 76 to 100 of 189. Each trial links to its page on Pharma Observatory.
89 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.
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