“…Creatinine is derived from the degradation of muscle creatine and creatine phosphate and is considered a biomarker of muscle mass in a steady state ( Virgili et al, 1994 ). Rosa et al (2018) found that the inclusion of creatinine in the broiler chicken diet increased feed conversion and breast weight. These findings confirm that the high concentrations of creatine, creatine phosphate, and creatinine in the TinamouS group are closely associated with muscle growth of the birds.…”