INS and type 2 diabetes mellitus: A meta-analysis of 24 RCTs, evaluating diets rich in MUFAs vs. CHOs or PUFAs, showed that high-MUFA-containing diets might improve metabolic factors in patients with T2DM, i.e., fasting insulin and glucose level, homeostasis model of assessment for insulin resistance (HOMA-IR) and β-cell function, HDL-C levels, and triglyceride levels [143].