For Participants

Everything you need to know if you’re either taking part or interested in participating in the Best-D trial

The Team

Meet the team who are responsible for this clincial trial

For GPs

Information for clinicians regarding the aims, outcomes and criteria regarding the Best-D trial



The aim of this study is to find out the daily dose of vitamin D needed in older people to maintain blood levels of vitamin D similar to those seen in healthy younger people at the end of the summer months. We will use this information to plan a much larger study of this dose of vitamin D to see whether several years of such treatment can prevent fractures and heart disease.