“…Most studies are of a poor quality, were mainly cross-sectional, and were influenced by confounding factors. The most recent meta-analysis included several biomarkers: calcium, phosphate, parathyroid hormone, vitamin D, pyrophosphate, OPG, RANKL, FGF-23, Klotho, osteopontin, osteocalcin, MGP and its inactive forms, and vitamin K. Of all the markers included, phosphate, osteopontin, and FGF-23 were found to be suitable biomarkers for MAC [ 124 ]. However, further studies are needed to test their predictive value for the development of MAC.…”