Test Details: Procollagen type 1 amino-terminal propeptide (P1NP) is a marker of bone formation. It is a cleavage product released during the extracellular processing of type 1 collagen. It is a health marker used to assess bone formation and health. P1NP can be useful in the assessment of skeletal remodeling under normal and abnormal conditions. It is used to monitor bone turnover in postmenopausal women and to monitor the effect of antiresorptive and anabolic therapy of bone metabolism.