INS and type 2 diabetes mellitus: In addition, according to consistent epidemiological and clinical evidence, a high intake of dietary fiber (in particular cereal fiber) and antioxidants, as well as a high consumption of foods including these compounds, such as fruits, vegetables, legumes and whole grains, is associated with improved insulin sensitivity, improved pancreatic β-cell secretory capacity and reduced risk of T2DM development [55,56].