backgrounds: vitamin d deficiency is a public health concern even in sunny areas, so we decided to assess the prevalence of vitamin d deficiency and its related factors among university students in shiraz. methods: this cross‑sectional study was carried out on 254 (128 male and 126 female) university students. demographic questionnaires and a questionnaire on exposure to sun light and sun prote...

We studied the effect of cholecalciferol (VD3) intake on VD3 status and markers of calcium (Ca) homeostasis in mice and rats. Serum 25 hydroxycholecalciferol (25OH-VD3) concentrations were increased in animals fed diets containing 400-20,000 international units (IU) VD3/kg (37 nmol.L(-1).1000 IU VD3(-1)), but body weight, serum Ca, and duodenal gene expression were not altered. High-VD3 intake ...

Serum 25-hydroxyvitamiu P and parathyroid hormone in patients with acute renal failure. The concentration of 25-hydroxyvitamin D (25-OH-D) in the serum of 18 patients with acute renal failure was measured serially using a sensitive radiocompetitive assay. In normal subjects, the mean concentration of serum 25OH-D was 16.6 ng/ml (range, 7.7 to 36 nglml). In patients with acute renal failure, the...

There have been methodological problems for studying hypovitaminosis D and K in the elderly. First, studies were done either by evaluating food intake or measuring their circulating levels, but rarely by both in Japan. In this paper, vitamin D and K intakes and their circulating levels were simultaneously determined. Second issue is whether hypovitaminosis D and K are independent of general mal...

Abstract Background and Aims The INSPIRE collaborative group built a prediction model that showed serum 25 hydroxyvitamin D concentration (25OH Vit D) may be predictor of gastrointestinal bleeding (GIB) hospitalizations in dialysis patients [1]. Unexpectedly, 25OH levels the target range (i.e., >30 ng/mL) were most associated with GIB hospitalization risk. We aimed to further investigate...

Methods A cross-sectional study of 223 randomly selected HIVinfected outpatients was undertaken. Recruitment was stratified by gender for age groups 30-39, 40-49 yrs and ≥50 yrs. Osteopenia and osteoporosis were diagnosed according to the WHO criteria. Patients completed a detailed questionnaire including combination HIV drugs (cART) history, & a dual-energy X-ray absorptiometry (DEXA) of Lumba...

BACKGROUND Endogenous (heterophile, human anti-animal …) antibodies are a known cause of interference in immunoassays. CASE REPORT A patient with hypercalcemia and low PTH levels was investigated. The serum 25OH vitamin D (25OHD) concentration was above the analytical range of the automated analyser (>150ng/mL) but serum dilutions were not linear. A myeloma-related monoclonal peak of immunogl...

The aim of this study was to evaluate differences in T helper cell sub-types and osteoclast (OCs) precursors in peripheral blood between patients affected by early rheumatoid arthritis (eRA) and healthy controls. The effect of administration of cholecalcipherol on clinical and laboratory parameters was subsequently evaluated, by a parallel, randomized double blind, placebo controlled trial. Thi...