Which vitamin d pill is best for your bones? new study aims to find out.
NCT ID NCT06138249
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at three different ways to take vitamin D in people with low levels. Participants will be randomly assigned to one of three groups: a monthly pill, a twice-monthly pill, or daily drops. After one month, researchers will measure vitamin D in the blood and check bone density. The goal is to see which method works best to raise vitamin D and support bone health.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 90 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2023
- Expected to finish
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Dec 2025
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Hypovitaminosis D (\<20ng/mL) Exclusion Criteria: * Osteoporosis (T score \<-2.5SD) * Renal or hepatic diseases
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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University of Bari
RECRUITINGBari, 70124, Italy
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