Monday, November 8, 2010

vitamin D deficiency

Ellen Says: Hypovitaminosis D is a deficiency of Vitamin D.

It can result from: inadequate nutritional intake of vitamin D coupled with inadequate sunlight exposure (in particular sunlight with adequate ultra violet B rays), disorders that limit vitamin D absorption, and conditions that impair the conversion of vitamin D into active metabolites including certain liver, kidney, and hereditary disorders.

Deficiency results in impaired bone mineralization and leads to bone softening diseases including rickets in children and osteomalacia and osteoporosis in adults.

Vitamin D deficiency is known to cause several bone diseases including:
Rickets, a childhood disease characterized by impeded growth, and deformity, of the long bones. The earliest sign of subclinical vitamin D deficiency is Craniotabes, abnormal softening or thinning of the skull.

Osteomalacia, a bone-thinning disorder that occurs exclusively in adults and is characterized by proximal muscle weakness and bone fragility.

Osteoporosis, a condition characterized by reduced bone mineral density and increased bone fragility.

Muscle aches and weakness.

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