نتایج جستجو برای: d deficiency
تعداد نتایج: 699908 فیلتر نتایج به سال:
Vitamin D comprises a group of fat-soluble pro-hormones, obtained from sun exposure, food, and supplements, and it must undergo two hydroxylation reactions to be activated in the body. Several studies have shown the role of vitamin D in mineral metabolism regulation, especially calcium, phosphorus, and bone metabolism. Some factors such as inadequate vitamin intake and liver or kidney disorders...
since early works on isolation and characterization of vitamin d by elmer verner mccollum and edward mellanby in 1900s, this molecule still seems mysterious (1-2). after several decades since discovery of the miraculous effect of cod liver oil in treatment of nutritional rickets, escalating number of reports provide a huge body of evidence for various effects of vitamin d on human body (3). the...
obesity is one of the health problems in the developing and developed countries. obesity subjects the individuals with metabolic and endocrine disorders. it is obvious that vitamin d deficiency or insufficiency may lead to secondary hyperparathyroidism. thus, obesity increases the risk of vitamin d deficiency. considering the high prevalence of vitamin d deficiency in children and adolescents w...
introduction: vitamin d has an important role in maintaining human health. the main source of vitamin d production is skin exposure to sunlight. accordingly with the spread of apartment life culture, growth of industrial cities and the increase of air pollution; vitamin d deficiency and its implications is an important factor in the appearance of debilitating diseases in different age categorie...
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...
Background Given the relationship of vitamin D deficiency with insulin resistance syndrome as the component of polycystic ovary syndrome (PCOS), the main aim of this study was to compare serum level of 25- hydroxyvitamin D [25(OH)D] between PCOS patients and normal individuals. MaterialsAndMethods A cross sectional study was conducted to compare 25(OH)D level between117 normal and 125 untreated...
Background and Aim: Vitamin D is provided through dietary intake or synthesis in the skin by ultraviolet ray from sunlight. Vitamin D has a significant role in calcium homeostasis and cellular growth and facilitating normal immune system function. High prevalence of vitamin D deficiency is a particularly important public health in Iran. to The present study aimed at describing the prevalence of...
Background and purpose: Vitamin  deficiency has been observed in both developed and developing countries, including the Middle Ëast. Ïn this study, the prevalence of vitamin D deficiency was investigated in Ïsfahani male and female high school students in 2004. Materials and methods : Ïn a cross-sectional study, 318 students (153 boys & 165 girls) aged 14-18 years were selected by multist...
Vitamin D deficiency is known as the most common nutritional deficiency. It is created during infancy due to different factors, including decreased dietary intake, decreased dermal synthesis, malabsorption, enzyme-inducing medications, and exclusive breastfeeding. Vitamin D deficiency is associated with poor bone health such as rickets and osteomalacia in children. Despite vitamin D plays an im...
vitamin d deficiency is one of the most preventable challenges worldwide. the aim of this study was to determine the prevalence of vitamin d deficiency among female nurses working at children’s medical center hospital in tehran, iran, due to the risk factor of being a notably long period indoors and the fact that their health status may have consequences on the process of patients’ treatment. a...
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