Therefore, a number of simple surrogate indices of insulin resistance and sensitivity have been developed, validated, and, in everyday practice, utilized, such as the Homeostasis Model Assessment (HOMA-IR), [12], HOMA-β cell [13], Triglyceride–Glucose index (TyG, [14]), TyG-BMI [15], Triglycerides/HDL-Cholesterol ratio (TG/HDL-C ratio, [16]), Disposition Index (DI, [17]), Metabolic Score for Insulin Resistance (MetS-IR, [18]), Single Point Insulin Sensitivity Estimator (SPISE, [19]), Non-HDL-cholesterol/HDL-cholesterol ratio (NHHR, [20]), and Lipoprotein Combine Index (LCI, [21]). Here, INS is linked to metabolic syndrome.