نتایج جستجو برای: vitamin a deficiency
تعداد نتایج: 13498368 فیلتر نتایج به سال:
Background and Aim: Vitamin D has a basic role in bone development and metabolism. Regarding high prevalence of vitamin D deficiency in Iran, we aimed to investigate its point prevalence in Arak, Iran and determine a cut-off point for vitamin D deficiency in the region. Materials and Methods: In a cross-sectional study,420 adolescents (220 girls, 200 boys) aged 10-16 years old were selected usi...
Background: Vitamin D plays an important role in the health, survival and fertility of humans, This Vitamin has a significant role in calcium homeostasis and cellular growth and facilitating normal immune system function. In recent years, the role of vitamin D in various diseases has been highlighted. Regarding high prevalence of vitamin D deficiency in Iran, The aim of this study was to determ...
vitamin b12 (cobalamin) is an essential coenzyme for nucleic acid synthesis. animal protein is the major dietary source of vitamin b12. deficiency of vitamin b12 leads to megaloblastic anemia, degeneration of the brain, spinal cord, peripheral nerves, and abnormalities of epithelial tissues. two factors are necessary for the cure of megaloblastic anemia: one in food (extrinsic factor) and one i...
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...
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...
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...
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...
prevalence of vitamin d deficiency and its related factors among university students in shiraz, iran
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...
Vitamin D deficiency is one of the major health problems that is unexpectedly prevalent in Iran. The ultraviolet (UV) rays of the sunlight are the most important source of vitamin D in humans. In contrast, environmental factors are one of the reasons for decrease in UV transmission to the earth which results in the reduction of vitamin D absorption. Since the role of environmental factors has b...
Introduction: Vitamin D deficiency (VDD) causes same diseases such as osteoporosis, osteomalacia, and fractures, and also it is shown that Vitamin D deficiency could lead to some cardiovascular disease, diabetes and many types of cancer. Therefore, this study aimed to determine the frequency of vitamin D deficiency among referring to laboratories in Eyvan city during 2015 and 2016. Methods: ...
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