Vitamin D in Overweight/Obese Women and Its Relationship With Dietetic and Anthropometric Variables

Abstract

Overweight/obese persons usually have an inadequate vitamin D status, a situation commonly made worse by an inadequate intake of this vitamin. For this reason, the aim of this study was to analyze dietetic and anthropometric differences in a group of young, overweight/obese Spanish women with respect to their vitamin D status. The study subjects were 66 white Spanish women (aged 20-35 years) with a BMI of 24-35 kg/m(2). Dietetic, anthropometric, and biochemical data were collected. Women were divided into two groups depending on their serum vitamin D concentrations: LD (women with <90 nmol/l 25(OH)D) and HD (women with >or=90 nmol/l 25(OH)D). The intakes of vitamin D, calcium, and supplements were similar in both groups. The body weight, BMI, and waist circumference of the HD subjects were smaller than those recorded for the LD subjects (68.6 +/- 4.2 kg, 26.0 +/- 1.3 kg/m(2), and 79.4 +/- 3.4 cm compared to 76.2 +/- 9.8, 28.6 +/- 3.2 kg/m(2), and 86.2 +/- 9.3 cm, respectively; P < 0.05). The hip circumference and the waist/hip ratio were similar in both groups. A BMI of <27.7 kg/m(2) (P50) was associated with serum vitamin D concentrations of >or=90 nmol/l (odds ratio = 0.1313; confidence interval: 0.0149-1.1599; P < 0.05). Overweight/obese women are at higher risk of vitamin D deficiency, largely due to excess adiposity rather than inadequate intake.

Associations between abdominal fat and body mass index on vitamin D status in a group of Spanish schoolchildren

“…A number of studies have reported a negative association between serum 25(OH)D concentration and body fat (Alemzadeh et al, 2008;McKinney et al, 2008;Kremer et al, 2009), perhaps due to the sequestration of the vitamin by the fat (Liel et al, 1988). Several studies performed on adults have reported a negative relationship between BMI and serum levels of vitamin D (Need et al, 2005;Konradsen et al, 2008;Kremer et al, 2009;Rodríguez-Rodríguez et al, 2009), and the same has been reported for children and adolescents (Alemzadeh et al, 2008;Bener et al, 2008a, b). In a group of 127 children and adolescents, Alemzadeh et al (2008) observed that those with serum 25(OH)D concentrations of o75 nmol/l had a greater BMI than those with higher concentrations (38.2±8.9 vs 33.9±6.0 kg/m 2 ; Po0.02).…”

Impact of gender on vitamin D deficiency in morbidly obese patients: a cross-sectional study

“…The median vitamin D intake in our sub-population of 8.4 mg/day was normal according to current Nordic recommendations. A recent Spanish study also reported adequate vitamin D intake according to regional recommendations in overweight and moderately obese women (Rodriguez-Rodriguez et al, 2009). Previous studies have shown that obese subjects tend to underreport EIs (Heitmann and Lissner, 1995;Johansson et al, 1998), especially women (Johansson et al, 1998).…”

Body composition and metabolic profile in adults with vitamin D deficiency

“…However, vitamin D is currently considered a true steroid hormone, and due to its significant influence on metabolism and cell proliferation [6], vitamin D deficiency has been associated with several diseases such as obesity and diabetes [7][8][9][10].…”