Vitamin D deficiency will cause removal of both the calcium and matrix from the bone, and as a result, will cause osteopenia and can precipitate and exacerbate osteoporosis. Unlike osteomalacia which causes bone pain, osteoporosis, which is porotic bone, i.e., holes in the bones and loss of bone does not cause bone pain unless there is an acute fracture. Typically this pain resolves as the fracture heals and can be easily distinguished from osteomalacia.
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