Format

Send to

Choose Destination
See comment in PubMed Commons below
J Investig Med. 2012 Dec;60(8):1214-8. doi: 10.2310/JIM.0b013e3182747c06.

Effect of vitamin D replacement on insulin sensitivity in subjects with vitamin D deficiency.

Author information

1
Department of Internal Medicine, Texas Tech University Health Sciences Center at Permian Basin, Odessa, TX, USA. simha.aj@mayo.edu

Abstract

BACKGROUND AND OBJECTIVE:

Low vitamin D levels correlate with measures of insulin resistance and prevalence of diabetes mellitus, but there are limited and conflicting data on changes in insulin resistance after vitamin D replacement. The objective of the current study was to examine whether vitamin D replacement improves insulin sensitivity.

METHODS:

In this randomized double-blind placebo-controlled study, 12 healthy subjects with plasma 25-hydroxy vitamin D (25[OH]D) levels of less than 20 ng/mL were treated with ergocalciferol, 50,000 units, orally once a week for 8 weeks or matching placebo. The main outcome measure was insulin-stimulated glucose infusion rate during the last 20 minutes of a hyperinsulinemic-euglycemic glucose clamp study.

RESULTS:

At baseline, plasma 25(OH)D levels were similar between the ergocalciferol and placebo groups (13.3 ± 3.8 and 15.7 ± 2.4 ng/mL, respectively; P = 0.3) but were higher in the ergocalciferol group at 8 weeks (18.8 ± 5 vs 12.5 ± 2.2 ng/mL; P = 0.02). Glucose infusion rate was similar between the 2 groups both at baseline and after 8 weeks of treatment. Changes in plasma 25(OH)D levels did not correlate with change in glucose infusion rate.

CONCLUSION:

Administration of ergocalciferol, 50,000 units, weekly for 8 weeks in subjects with low vitamin D levels improves 25(OH)D levels but does not improve insulin sensitivity.

PMID:
23111651
DOI:
10.2310/JIM.0b013e3182747c06
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Support Center