Vitamin d and k: the Bone-Boosting duo under the microscope
NCT ID NCT04573946
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how vitamin D and vitamin K interact to affect bone density and fracture risk in older adults. Researchers are analyzing data from over 25,000 participants who took vitamin D and omega-3 supplements or placebos. The goal is to see if people with low vitamin K levels get more bone benefits from vitamin D.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Vitamin D3 (cholecalciferol) and omega-3 fatty acids (fish oil)
What this could lead to
If successful, this could clarify whether vitamin K status influences how well vitamin D supplements protect bones, guiding future bone health recommendations.
What could go wrong
This is an observational analysis of an existing trial, not a new treatment test. Results may show no clear link or may not apply to everyone.
Disclaimer
Read more
Show less
This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for BONE DENSITY are added.
By submitting, you agree to our Terms of use
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.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
By submitting, you agree to our Terms of use
Locations
-
Brigham and Women's Hospital
Boston, Massachusetts, 02115, United States