Assertion: osteoporosis | /r/CreatedBy | vitamin d deficiency
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text: However, osteoporosis can be caused by vitamin D deficiency, hyperparathyroidism, hyperthyroidism, corticosteroid medications (steroids such as prednisone and prednisolone), post-menopause low estrogen state, low testosterone blood levels, alcoholism, smoking, thin body frame, immobility, and malabsorption.