Vitamin D and Type 2 Diabetes Study (D2d Study)
The purpose of this study is to evaluate the effect of taking vitamin D supplements on the prevention of diabetes in people who are at high risk for diabetes. D2d is a multi-center trial, and will consist of a total of approximately 2,400 participants nationwide. Please feel free to check the study website for more information.
Eligible participants for this study meet the following criteria:
- Both men and women
- 30 years of age or older
- Have prediabetes (“borderline” diabetes)
- Must be willing to be randomly assigned to take either a vitamin D supplement (4000 international units) or a placebo for roughly 4 years
Participation in the study will require up to 13 scheduled visits to the Clinical Translational Unit (CTRU) at Stanford Hospital & Clinics, which will include blood draws at certain time points.
Depending on study involvement, participants may receive up to $320 in compensation over 4 years.
How to Participate
We have completed the recruitment and are completing the final phase of the study. If you have questions, please contact the study coordinator, Melanie Rosenberg, at email@example.com or 650-485-3910.