While vitamin D3 is recognized as a neuroactive steroid affecting both brain development and function, efficient analytical method in determining vitamin D3 metabolites in the brain tissue is still lacking, and the relationship of vitamin D3 status between serum and brain remains elusive. Therefore, we developed a novel analysis method by using high performance liquid chromatography-tandem mass...

Vitamin D deficiency is a global health problem. This study aimed to investigate the efficacy of ultraviolet (UV) B radiation for improving vitamin D3 content of eggs and meat. In a two-factorial design hens that received diets with 0 (-D3) or 3,000 IU (+D3) vitamin D3/kg were non-exposed (-UVB) or exposed to UVB radiation (+UVB) for 3 h daily over 4 weeks. Data show that UVB radiation was very...

introduction: multiple sclerosis (ms) is a chronic autoimmune disease with unknown etiology affecting the central nervous system. the prevalence of ms is highest where environmental supplies of vitamin d are lowest. some studies have shown a strong protective effect of vitamin d3 in experimental autoimmune encephalomyelitis (eae) a model of ms. however, it is not known whether vitamin d3 has a ...

objective(s):multiple sclerosis (ms) is a demyelinating disease. the prevalence of ms is highest where environmental supplies of vitamin d are low. cognitive deficits have been observed in patients with ms. oxidative damage may contribute to the formation of ms lesions. considering the involvement of hippocampus in ms, an attempt is made in this study to investigate the effects of vitamin d3 on...

Background: Vitamin D deficiencies are highly prevalent globally, but the correlation between serum alkaline phosphatase and vitamin D3 deficiency among Indian children is seldom investigated. To describe the correlation of vitamin D3 levels and serum alkaline phosphatase levels among children admitted with malnutrition to the pediatric wards of a tertiary care center. Methods: This descriptiv...

CONTEXT Two reports suggested that vitamin D2 is less effective than vitamin D3 in maintaining vitamin D status. OBJECTIVE Our objective was to determine whether vitamin D2 was less effective than vitamin D3 in maintaining serum 25-hydroxyvitamin D levels or increased the catabolism of 25-hydroxyvitamin D3. SUBJECTS AND DESIGN This was a randomized, placebo-controlled, double-blinded study ...

Antioxidative mechanisms of vitamin D3 were evaluated both in vitro and in vivo. A 4-h incubation of brain homogenates at 37 degrees C increased the formation of Schiff base fluorescent products of malonaldehyde, an indicator of lipid peroxidation. Incubation with vitamin D3 dose-dependently suppressed auto-oxidation. The antioxidative potency for inhibiting zinc-induced lipid peroxidation was ...

PURPOSE This study was designed to measure vitamin D metabolites in the aqueous and vitreous humor and in tear fluid, and to determine if dietary vitamin D3 supplementation affects these levels. We also determined if the corneal epithelium can synthesize vitamin D following UV-B exposure. METHODS Rabbits were fed a control or vitamin D3 supplemented diet. Pilocarpine-stimulated tear fluid was...