Clinical trials
Observational Vitamin B 12 Deficiency trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
27 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2007 | 1 |
| 2009 | 1 |
| 2011 | 1 |
| 2012 | 1 |
| 2013 | 2 |
| 2015 | 1 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2022 | 4 |
| 2024 | 3 |
| 2025 | 5 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 19 |
| Unknown status | 4 |
| Not yet recruiting | 2 |
| Enrolling by invitation | 1 |
| Recruiting | 1 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Institute of Nutrition, Slovenia (Nutris) | 3 |
| Gaziosmanpasa Research and Education Hospital | 2 |
| Assiut University | 1 |
| Centre Hospitalier Universitaire de Liege | 1 |
| Charite University, Berlin, Germany | 1 |
| Clionsky Neuro Systems Inc. | 1 |
| Cornell University | 1 |
| Fatih Sultan Mehmet Training and Research Hospital | 1 |
| Hydrocephalus and Neuroscience Institute | 1 |
| Instituto Nacional de Salud Publica, Mexico | 1 |
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 B 12 Deficiency | 27 |
| Folic Acid Deficiency | 10 |
| Anemia | 6 |
| Vitamin D Deficiency | 6 |
| Anemia, Iron-Deficiency | 4 |
| Diabetes Mellitus, Type 2 | 3 |
| Iron Deficiencies | 3 |
| Avitaminosis | 2 |
| Hyperhomocysteinemia | 2 |
| Vitamin A Deficiency | 2 |
Trials
Showing 26 to 27 of 27. Each trial links to its page 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.
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