MSTN and diabetes mellitus: Taken together, serum myostatin levels from different populations are displayed in Table 1, not only for different age groups and sexes of healthy individuals, but also for various ailments such as kidney, heart, lung, muscular and skin diseases, diabetes, and metabolic syndrome [30,31,32,33,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49].