DDM2 study

About the DDM2 study

Researchers at Tufts Medical Center (Boston, MA) and Cincinnati VA Medical Center (Cincinnati, OH) are conducting a research study in adults with type 2 diabetes to see whether daily vitamin D supplementation affects how the body processes glucose (sugar). A better understanding of vitamin D on glucose metabolism may lead to new treatments for type 2 diabetes.

According to the Centers for Disease Control and Prevention, about 26 million Americans have diabetes and about 80 million more are at risk for developing diabetes. Persons who are older than 45 years of age, are overweight, have a family member with type 2 diabetes, have high blood pressure, or do not get enough exercise are at risk for type 2 diabetes. Women who had diabetes during pregnancy and people of certain races and ethnicities are also at risk.

Participants will be enrolled in the DDM2 study at two locations:

Tufts Medical Center, Boston, MA
Principal Investigator: Anastassios G. Pittas, MD MS

Cincinnati VA Medical Center, Cincinnati, OH
Principal Investigator: David D’Alessio, MD

The study will be identical at both locations.

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Become a research participant in the DDM2 study

Inclusion Criteria

Eligible volunteers will be:

  • Men and Women
  •  Ages 25 to 75
  • Diagnosed with type 2 diabetes
  • Willing to take a daily supplement

If you take supplements containing vitamin D or calcium, you must agree not to take any multivitamin or other preparations containing vitamin D or calcium during the trial, in excess of what what is recommended by the Institute of Medicine recommendations.

Exclusion Criteria

Ineligibility will be determined based on:

  • Diabetes medications, other than metformin
  • History of kidney stones or kidney disease
  • Pregnancy or the intent to become pregnant within the next year, or currently breastfeeding
  • Any other medical condition that in the opinion of the site investigators may put the participant at increased risk of harm

Other exclusions also apply.

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DDM2 contact information

If you are interested in participating, please contact us for a brief interview over the telephone and, if eligible, a screening visit at Tufts Medical Center in Boston MA or Cincinnati VA Medical Center in Cincinnati OH.

Tufts Medical Center – Boston

Phone: 617-636-2834
Email: DDM2@tuftsmedicalcenter.org

Clinical Research Center (CRC) Room 636   (click here to view map)
Farnsworth Building, 6th Floor
Tufts Medical Center
800 Washington St
Boston, MA 02111

Cincinnati VA Medical Center – Cincinnati

Phone: 513-475-6478
Email: MaryColleen.Rogge@va.gov

Veterans Affairs Medical Center
4th Floor South, Room A457f
3200 Vine Street
Cincinnati, Ohio 45220

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DDM2 study sponsors

Division of Endocrinology, Diabetes and Metabolism at Tufts Medical Center

National Institute of Diabetes and Digestive and Kidney Diseases








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Vitamin D for Diabetes | Division of Endocrinology, Diabetes and Metabolism | Tufts Medical Center | 800 Washington Street | Boston MA | Email
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