IAPP and type 2 diabetes mellitus: No difference in IAPP levels was found between the different T2D management strategies (i.e., diet alone, diet and metformin, diet and insulin, or diet and combination of metformin and insulin) at baseline, after 3 months, or at the clinical follow-up (p = 0.810, p = 0.808, and p = 0.298, respectively).