In this regard, human PTH(1–34) or teriparatide, the amino terminal fragment of PTH, is a proven, effective bone anabolic agent and has been approved by the FDA for treating both postmenopausal (Neer et al. 2001) and glucocorticoid induced (Saag et al. 2007) osteoporosis. This evidence concerns the gene PTH and osteoporosis.