MSTN and sarcopenia: It was observed that the circulating myostatin concentrations correlated with IR, myostatin expression and secretion increased in skeletal muscle and adipose tissue samples obtained from obese and severely obese women.[11] Myostatin levels are increased in T2DM patients.[38] In our study, myostatin levels were similar in patients with and without sarcopenia, which may be due to the low number of cases in our study.