Abstract

MOLINE LANA, María Esther; CARIAS PICON, Diamela  and  BARRIOS OSPINO, Yubire Beatriz. Vitamin D in serum and its relationship with adiposity and insulin resistance in postmenopausal womens. Acta bioquím. clín. latinoam. [online]. 2017, vol.51, n.4, pp.581-592. ISSN 0325-2957.

Menopause is associated with an increase in body weight and fat redistribution from the gluteal-femoral region to the abdominal region. Recently, excess weight and adipose tissue have been linked to hypovitaminosis D, which in turn, has been linked to insulin resistance. The aim of this study was to determine serum vitamin D levels and establish their relationship with indicators of adiposity and insulin resistance in postmenopausal women of normal weight, overweight or obese. A descriptive-correlational, cross-sectional and field study was conducted. Eighty-four women with an average age of 56.29±5.64 years participated. Weight, height, waist circumference (WC), body fat (BF), fasting glucose, basal insulin and vitamin D levels were measured. Body mass index (BMI) and HOMA (Homeostasis Model Assessment) were calculated. A total of 34.54% of the women were normal weight, while 33.33% and 32.14%, respectively, were overweight or obese. A 39.29% of insulin resistance was found, with an average rate of 2.55 HOMA; moreover the values of this index were significantly correlated with BMI (r=0.55; p <0.01), WC (r=0.51; p <0.01), and BF (r=0.34, p<0.01).The average concentration of vitamin D was 27.35±8.55 ng/mL, and no significant differences between normal weight women and those overweight or obese were found. A total of 25% of the women had vitamin D deficiency, while 36.9% had insufficient vitamin values. No significant associations between serum concentrations of vitamin D and BMI, WC, the percentage of body fat or HOMA were found. According to these results, vitamin D deficiency may be a common problem in Venezuelan postmenopausal women. However, serum concentrations of this vitamin showed no significant association with obesity or with insulin resistance in the sample evaluated.

Keywords : Postmenopausal women; Serum vitamin D; Overweight; Obesity; Insulin resistance.

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