The aims of this study were to examine the association between circulating vitamin D (25(OH)D) levels and depressive symptoms and to evaluate the associations between depressive symptoms and various sociodemographic factors. Data on serum 25(OH)D levels, sociodemographic factors, and information on depressive symptoms were obtained from the Korea National Health and Nutrition Examination Survey...

This interlaboratory study on determination of 25-hydroxyvitamin D (25-OH-D) in serum involved 15 laboratories in eight European countries. All could distinguish between normal (50 +/- 31 nmol/L, mean +/- SD) and grossly increased concentrations, but for eight laboratories the results for serum samples with low and normal 25-OH-D content overlapped. In general, values were well reproducible, bu...

OBJECTIVE To evaluate the prevalence of inadequate vitamin D status and its relationship with associated factors in 91 elderly hypertensive patients in João Pessoa, PB/BR. MATERIALS AND METHODS In a cross-sectional study, levels of 25-hydroxyvitamin D of 91 elderly patients were compared with biochemical, anthropometric, and dietary data, type of skin, exposure to sunlight, and blood pressure...

OBJECTIVE Vitamin D insufficiency is highly prevalent, with particular subgroups at greater risk (e.g. the elderly and those with darker skin). Vitamin D insufficiency may partly explain US racial/ethnic disparities in the prevalence of periodontitis and tooth loss. We evaluated the association between a predictor score of plasma 25-hydroxyvitamin D (25(OH)D) and incidence of periodontitis and ...

The metabolism of [3H]vitamin D3 in hepatectomized vitamin D-deficient rats has been studied. Hepatectomy drastically disrupts vitamin D3 metabolism as revealed by prolonged high levels of [3H] vitamin D3 in the plasma compartment even 12 h after dose in contrast to sham-operated controls. Some conversion of [3H] vitamin D3 to [3H]25-hydroxyvitamin D3 was detected in hepatectomized rats, but th...

Background: Secondary hyperparathyroidism (sHPTH) due to vitamin D deficiency impairs the bone mineral density (BMD) response alendronate, 1-2 but optimal strategy for its correction in postmenopausal osteoporotic women (PMO) about start zoledronic acid (ZOL) therapy is still unknown. Objectives: To evaluate effects of cholecalciferol (D3) and calcifediol (25OHD) on serum 25-OH-vitamin (s25OHD)...

Objective. To examine the effectiveness of oral vitamin D(3) (400 IU) supplementation on the nutritional vitamin D status of breastfeeding infants. Design. As part of a larger ongoing vitamin D RCT trial of lactating women, infants of mothers assigned to control received 1 drop of 400 IU vitamin D(3)/day starting at one month of age. Infant 25(OH)D levels (mean +/- S.D.) were measured by RIA at...

BACKGROUND Vitamin D has a role in regulating immune function, and its deficiency is a suggested risk factor for childhood pneumonia. Our aim was to assess whether oral supplementation of vitamin D(3) (cholecalciferol) will reduce the incidence and severity of pneumonia in a high-risk infant population. METHODS We did a randomised placebo-controlled trial to compare oral 100,000 IU (2·5 mg) v...