• About D2d
  • Diabetes Risk Questionnaire

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Are You at Risk for Diabetes

There are 86 million Americans with pre-diabetes (1/3 of the adult population) and their chance of developing diabetes is about 10% per year. Lifestyle changes, such as healthy eating and exercising, aiming at weight loss can lower risk of diabetes. However, many people at risk still develop diabetes despite efforts at changing lifestyle.
To find out about pre-diabetes, Click here.

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Study News

D2d has enrolled over 1,500 participants
Click here for D2d featured in Washington Post
Click here for Rationale and Design of D2d
Click here for NIH Press Release
Click here for Tufts Medical Center Press Release
Click here for Fox News Video

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Participate and Spread the Word

To see if you are at risk for diabetes, and whether you qualify for D2d, click here.
Know someone, a friend or family member, who may be at risk for developing diabetes and might be interested in joining D2d as a participant and contribute to diabetes research? You can easily share with others by email or on social media.

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The D2d study is underway

D2d is a large-scale clinical trial to investigate if vitamin D supplementation helps prevent or delay type 2 diabetes in adults who are at high risk for diabetes (pre-diabetes). "Past observational studies have suggested that higher levels of vitamin D may be beneficial in preventing type 2 diabetes, but until the D2d study is complete, we won’t know if taking vitamin D supplements lowers the risk of diabetes,” said Anastassios G. Pittas, M.S., M.D., the study’s principal investigator. The D2d study is funded by the National Institutes of Health and taking place in 22 cities across the United States.

Click here to find out how to participate

D2d is a nationwide study

D2d takes place in 22 medical centers across the United States. Approximately 35% of the US population lives within the larger metropolitan areas covered by the D2d sites. In Charleston, South Carolina there is a D2d site at the Medical University of South Carolina led by Dr. O’Neil. The South Carolina D2d team looks forward to contributing knowledge to help people with pre-diabetes.

Click here to find out how to participate
Funding provided by
D2d | Division of Endocrinology, Diabetes and Metabolism | Tufts Medical Center | Boston, MA

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