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Updated: Jun 6, 2026

In Silico Clinical Trials for Cardiovascular Disease
Published on: May 27, 2022
Vitamin D and the heart: why we need large-scale clinical trials
1Division of Preventive Medicine, Brigham and Women's Hospital, Harvard Medical School, 900 Commonwealth Avenue, Boston, MA 02215, USA. jmanson@rics.bwh.harvard.edu
Abstract:
Although vitamin D supplementation appears to be a promising intervention for reducing risks of cancer, cardiovascular disease, and other chronic diseases, existing evidence on its benefits and risks is limited and inconclusive. Recruitment is now under way for the Vitamin D and Omega-3 Trial (VITAL), the first large-scale randomized clinical trial of these nutritional agents for the primary prevention of cancer and cardiovascular disease.
Insights
Vitamin D and Omega-3 Trial (VITAL) is a large study investigating if these supplements prevent cancer and cardiovascular disease. Current evidence is limited, prompting this primary prevention research.
Area of Science:
- Nutritional science
- Preventive medicine
- Clinical trials
Background:
- Vitamin D supplementation shows potential for reducing risks of cancer, cardiovascular disease, and chronic diseases.
- Existing evidence regarding the benefits and risks of vitamin D is limited and inconclusive.
- Large-scale trials are needed to confirm the efficacy of nutritional agents in primary prevention.
Purpose of the Study:
- To conduct the first large-scale randomized clinical trial on vitamin D and omega-3 fatty acids for primary prevention.
- To investigate the effects of vitamin D and omega-3 supplementation on cancer incidence.
- To evaluate the impact of vitamin D and omega-3 supplementation on cardiovascular disease events.
Main Methods:
- The Vitamin D and Omega-3 Trial (VITAL) is a large-scale, randomized, placebo-controlled clinical trial.
- Participants are recruited for the primary prevention of cancer and cardiovascular disease.
- The trial investigates the effects of vitamin D and omega-3 fatty acid supplementation.
Main Results:
- Recruitment is currently underway for the VITAL trial.
- The trial aims to provide conclusive evidence on the benefits and risks of vitamin D and omega-3 supplementation.
- Results are pending as the study progresses.
Conclusions:
- The VITAL trial is expected to yield significant insights into the role of vitamin D and omega-3s in chronic disease prevention.
- This study will address the current limitations in evidence regarding these nutritional agents.
- Findings will inform public health recommendations on vitamin D and omega-3 supplementation.
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