| Effect | Increase |
| Trial Design | Non-controlled trial |
| Trial Length | 1-6 months |
| Number of Subjects | 10 |
| Sex | Female |
| Age Range | 30-44, 45-64 |
| Body Types | Overweight |
Study conducted in diabetic (type II) women with insulin resistance.
A month of vitamin D supplementation at 1332 IU was able to increase insulin secretion by 34.3%. This increased secretion was significantly correlated with serum vitamin D levels.
After one month, a 21.4% decrease in peripheral insulin resistance was also seen.
