Moreover, a high intake of dietary fiber (particularly cereal fiber), antioxidants, and monounsaturated fatty acids (MUFAs), along with foods containing these nutrients, has been linked to improved insulin sensitivity, the ability of pancreatic β-cells to secrete insulin, and a lower risk of developing T2D (Figure 1), according to consistent epidemiological and clinical evidence [108,109]. Here, INS is linked to type 2 diabetes mellitus.