The effect of vitamin D replacement therapy on insulin resistance and androgen levels in women with polycystic ovary syndrome

Selimoglu H., Duran C., Kiyici S., Ersoy C., Guclu M., ÖZKAYA G., ...More

JOURNAL OF ENDOCRINOLOGICAL INVESTIGATION, vol.33, no.4, pp.234-238, 2010 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 4
  • Publication Date: 2010
  • Doi Number: 10.1007/bf03345785
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.234-238
  • Keywords: Insulin resistance, polycystic ovary syndrome, vitamin D, glucose metabolism, androgen, LONG-TERM TREATMENT, GLUCOSE-TOLERANCE, HYPOVITAMINOSIS-D, OBESE WOMEN, SENSITIVITY, SECRETION, 1,25-DIHYDROXYVITAMIN-D3, PREVALENCE, RECEPTOR, TESTOSTERONE
  • Bursa Uludag University Affiliated: Yes


Insulin resistance (IR) is one of the common features of the polycystic ovary syndrome (PCOS), and recent studies indicate the possible role of vitamin D in the pathogenesis of IR and glucose metabolism. Aim of this study was aimed to determine the effect of vitamin D replacement therapy on glucose metabolism, insulin, and androgen levels in obese, insulin-resistant women with PCOS. Eleven women with PCOS were included in the study. Mean age of the patients was 23.6+/-5.7 yr, body mass index 33.9+/-5.1 kg/m(2). Six patients (54.5%) had acantosis nigricans and 10 (90.9%) oligoamenorrhea. The mean Ferriman Gallwey score was 14.1+/-4.6. Only 2 women were within the normal limits of vitamin D levels as >20 ng/ml. Three weeks after the administration of the single dose of 300,000 units of vitamin D3 orally, 25-hydroxyvitamin D3 significantly increased from 16.9+/-16 ng/ml to 37.1+/-14.6 ng/ml (p: 0.027) and only 2 women were detected to have vitamin D3 levels <20 ng/ml. Although glucose and insulin levels were decreased non-significantly, homeostasis model assesment (HOMA)-IR significantly decreased from 4.41+/-1.38 to 3.67+/-1.48 (p: 0.043). No significant alterations were witnessed at the levels of DHEAS, total and free testosterone, androstenedione. No correlation was found between vitamin D with HOMA and other hormonal parameters. In conclusion, women with PCOS have mostly insufficient vitamin D levels, and vitamin D replacement therapy may have a benefical effect on IR in obese women with PCOS. (J. Endocrinol. Invest. 33: 234-238, 2010) (C) 2010, Editrice Kurtis