Hypovitaminosis D is nothing, but deficiency of Vitamin D. Other than this, certain medical conditions can hinder with the absorption of vitamin D and some disorders can impair the conversion of vitamin D into active metabolites, such as certain kidney, liver and hereditary disorders. Hypovitaminosis D or Vitamin D deficiency is also thought to be related to the pathogenesis of non-alcoholic fatty liver disease. Advertisement Pathophysiology of Hypovitaminosis D or Vitamin D Deficiency Hypovitaminosis D or Vitamin D deficiency is closely related to the development of pre-eclampsia in pregnant women. Hypovitaminosis D or Vitamin D deficiency causes impaired intestinal absorption of calcium, which leads to low levels of serum total and ionized calcium levels. Patient then suffers from secondary hyperparathyroidism from the hypocalcaemia.
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Vitamin D deficiency
Open in a separate window Vitamin D deficiency can contribute to bone loss from decreased vitamin D—mediated intestinal calcium absorption and resultant secondary hyperparathyroidism HPT. This contributes to secondary HPT and metabolic bone disease. Superimposed nutritional deficiency may aggravate secondary HPT both directly as a result of low vitamin D levels and indirectly as a result of impaired vitamin D—mediated intestinal calcium absorption. Emerging evidence is challenging our understanding of bone and vascular health in stage IV to V CKD, such that vitamin D, calcitriol, or vitamin D analogs should be used according to current CKD guidelines and under the guidance of a nephrologist. It has been suggested that clinicians should routinely test for hypovitaminosis D in patients with musculoskeletal symptoms, such as bone pain, myalgias, and generalized weakness, because these symptoms are often associated with hypovitaminosis D and might be misdiagnosed as fibromyalgia, chronic fatigue, age-related weakness, or even depression.
What is Hypovitaminosis D or Vitamin D Deficiency & How is it Treated?
Mapping of several bone diseases onto levels of vitamin D calcidiol in the blood  Normal bone vs. Osteoporosis Vitamin D deficiency is typically diagnosed by measuring the concentration of the hydroxyvitamin D in the blood, which is the most accurate measure of stores of vitamin D in the body. Osteoporosis , a condition characterized by reduced bone mineral density and increased bone fragility. Increased risk of fracture   Rickets , a childhood disease characterized by impeded growth and deformity of the long bones. The exact relationship of these conditions is not well understood. People with a darker pigment of skin or increased amounts of melanin in their skin may have decreased production of Vitamin D. This is an inactive metabolite of vitamin D but is a necessary precursor building block to create the active form of vitamin D.
Vitamin D Deficiency in Adults: When to Test and How to Treat