Official Title

Effect of Vitamin D Supplementation on Hemoglobin A1c in Patients With Uncontrolled Type 2 Diabetes Mellitus
  • Phase

  • Study Type

  • Status

    Completed No Results Posted
  • Intervention/Treatment

    vitamin d3 vitamin c ...
  • Study Participants

The purpose of this study is to determine if daily supplementation with 2000 International Units of Vitamin D will improve hemoglobin A1c in uncontrolled type 2 diabetics.
Vitamin D is typically understood to support musculoskeletal health when administered concomitantly with calcium. A number of recent studies suggest, however, that this important nutrient may play a significant role in many pathophysiological processes, including diabetes mellitus. With the prevalence of diabetes mellitus ever increasing, novel mechanisms for controlling blood glucose and hemoglobin A1c are being sought to help prevent the costly and debilitating complications of this chronic disease.
Study Started
Oct 31
Primary Completion
Mar 31
Study Completion
Mar 31
Last Update
May 06

Dietary Supplement Vitamin D3 2000 international units daily

Vitamin D3 2000 international unit tablets once daily for 3 months

Dietary Supplement Vitamin C 500mg daily

Vitamin C 500mg tablets once daily for 3 months

Vitamin D 2000 international units daily Experimental

Vitamin C 500mg daily Active Comparator


Inclusion Criteria:

Type 2 diabetes mellitus
Hemoglobin A1c >7% measured in the 3 months prior to randomization
Age 21 to 75 years

Exclusion Criteria:

Renal insufficiency (defined as CrCl <30mL/min)
Gestational diabetes
Malabsorption syndrome
Patients taking vitamin D supplements at doses >400 international units daily
No Results Posted