background: benign paroxysmal positional vertigo (bppv) is linked to vitamin d deficiency. this clinical trial aimed to determine the influence of vitamin d supplementation on intensity of bppv. methods: the study population was selected consecutively and the diagnosis of bppv was made by history and clinical examination and exclusion of other conditions. intensity of bpvv was assessed based on...

Background Recently the prevalence of obesity and its comorbidities has increased in children, in the worldwide. Some evidences show that there is a reverse relation between the serum level of 25-hydroxyvitamin D[25(OH)D] and Body mass index (BMI). The purpose of this study was scrutiny response to treatment vitamin D deficiency in obese/overweight children. Materials and Methods  In this cross...

Mounting evidence suggests that vitamin D deficiency could be linked to several chronic diseases, including cardiovascular disease and cancer. The purpose of this study was to examine the prevalence of vitamin D deficiency and its correlates to test the hypothesis that vitamin D deficiency was common in the US population, especially in certain minority groups. The National Health and Nutrition ...

The role of vitamin B12 in the folate dependent biosynthesis of thymidine nucleotides is controversial. In an attempt to clarify this, three methods have been used to assess the relative efficacy of vitamin B12 (hydroxocobalamin) and various folate analogues in titrated concentrations at correcting 'de novo' thymidylate synthesis by megaloblastic human marrow cells: (1) The deoxyuridine (dU) su...

BACKGROUND Impaired vitamin B(12) function and decreased vitamin B(12) status have been associated with neurological and cognitive impairment. Current assays analyze total vitamin B(12) concentration, only a small percentage of which is metabolically active. Concentrations of this active component, carried on holotranscobalamin (holoTC), may be of greater relevance than total vitamin B(12). M...

OBJECTIVE To determine the frequency of subclinical vitamin D deficiency in an ambulatory care setting. METHODS This was an observational study which measured 25 vitamin D levels in medical clinic patients. Patients with chronic renal failure, known osteomalacia and rickets were excluded. A total of 119 patients were evaluated. They were divided in three diagnostic categories based on their s...

BACKGROUND Vitamin-D deficiency has been linked with impaired development in animal studies; however, the evidence from human studies is scanty. Evidence as to whether vitamin-D deficiency during early childhood affects growth is also limited and conflicting. We examined the extent to which vitamin-D deficiency (<10 ng/ml) is associated with neurodevelopment and physical growth in young childre...

A cross-sectional study was conducted from September to December 1998 among 300 children aged 1-3 years in Bungoma district of western Kenya. This is an area endemic for malaria with a high prevalence of vitamin A deficiency. In 1993 the prevalence of vitamin A deficiency was 37.8%. In the present study effects of vitamin A deficiency on health and growth of children were studied. Twenty-nine p...

Background: Exposure to sunlight is the main source of vitamin D production. This study was performed to assess the status of serum vitamin D across the different seasons in geographic region of Babol, with latitude of 36 in northern Iran. Methods: The study – female participants were 15 years old and above selected prospectively according to the inclusion criteria who attended an Outpatient c...

BACKGROUND Acute exacerbations of COPD (AECOPD) are common and strongly influence disease severity and relative healthcare costs. Vitamin D deficiency is frequent among COPD patients and its contributory role in disease exacerbations is widely debated. Our aim was to assess the relationship of serum vitamin D levels with COPD severity and AECOPD. METHODS Serum vitamin D (25-hydroxyvitamin D) ...