Fasting did not influence the other bone turnover markers in the CKD group, while in the control group P1NP and osteocalcin were 10% (p < 0.001) and 21% (p = 0.007) higher, respectively, and BAP was lower (6%) (p < 0.001) in the fasting state (Table 2). This evidence concerns the gene BGLAP and chronic kidney disease.