Background: Ensuring adequate vitamin D status in older adults may reduce the risk of osteoporosis. Serum 25-hydroxyvitamin D [25(OH)D] concentration is the recommended biomarker of vitamin D status, but the optimal serum 25(OH)D concentration for bone health in postmenopausal women remains unclear. Objective: The aim of this study was to apply the highly sensitive Ca skeletal labeling techniqu...

The aim of this study was to assess the correlation of serum vitamin D with ICU length of stay, mortality rate, length of mechanical ventilation, and incidence of sepsis. We conducted a descriptive analytic study on 793 patients admitted to surgical ICU wards in northwest of Iran from March 2015 to March 2016. Patients were assessed during the ICU stay and the following data were collect...

Background: Animal models and observational studies have suggested a favorable role of vitamin D in male reproduction. However, randomized clinical trials investigating the effect of vitamin D supplementation on male fertility are limited. Therefore, this study aimed to examine the effect of vitamin D supplementation on semen quality, reproductive hormones, and anthropometric measurements in vi...

in this study, the aim was to determine whether adding vitamin d to the standard therapeutic regimen of schizophrenic male patients with inadequate vitamin d status could improve some aspects of the symptom burden or not. this study was an open parallel label randomized clinical trial. eighty patients with chronic stable schizophrenia with residual symptoms and vitamin d deficiency were recruit...

OBJECTIVES The aim of this study was to assess 25-hydroxyvitamin D (vitamin D) status in an HIV-infected adult population and to define HIV- and antiretroviral-related factors associated with vitamin D deficiency. METHODS Using data from a prospective cohort of HIV-infected adult patients followed in five French centres (Dat'AIDS cohort), we evaluated the prevalence of vitamin D deficiency/in...

In ruminants, circulating vitamin D levels may be influenced by photoperiod, nutrition, physiological stage, ambient temperature, attitude and season, whereas, in meat, vitamin D content may be impacted by vitamin D status of animal, ageing and cooking. The information on nutritional value of camel milk and meat is largely available, but, there are very few reports evaluating the vitamin D leve...

background vitamin d deficiency is believed to cause variety of abnormalities such as liver stiffness and fibrosis. it is also shown that vitamin d deficiency may result in chronic liver disease or liver cirrhosis. in this study, we aimed to systematically review the literature wherein the relationship between vitamin d deficiency and the severity of chronic liver disease or liver cirrhosis had...

Andrew J. Solomon, MD WHAT IS VITAMIN D AND WHY IS IT IMPORTANT IN MS? Vitamin D is a vitamin that acts like a hormone in the human body. We get vitamin D from sunlight, food, or dietary supplements. The study by Stein et al.1 examines the relationship of vitamin D and MS. In addition, a recent Patient Page in Neurology focused on the actions of vitamin D and vitamin D deficiency.2 The best lev...

BACKGROUND Clinical assessment of vitamin D status often relies on measuring total circulating 25-hydroxyvitamin D3 (25OHD3), but much of each vitamin D metabolite is bound to plasma vitamin D-binding protein (DBP), such that the percentage of free vitamin is very low. We hypothesized that measurement of free rather than total 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] and 25OHD3 may provide better...