FNDC5 and type 2 diabetes mellitus: More similar to our study, Shanaki et al29 demonstrated lower levels of irisin in T2DM, MAFLD, and MAFLD+T2DM patients than the controls, while it was performed on Iranian people and the correlation analysis between irisin level and anthropometric and biochemical variables were limited due to several r values less than 0.4 and a small-scale sample size.