Diabetes mellitus is characterized by persistent hyperglycemia, metabolic dysfunction involving fats, proteins, and carbohydrates, and a total deficiency of insulin. As one of the world’s most prevalent and economically burdensome chronic conditions, its reach is expanding alongside shifting lifestyle patterns and enhanced medical care, which has extended the life expectancy of affected individuals. While its impact varies across ethnic groups, the disease is seeing a sharp rise in both incidence and prevalence, particularly within developing nations, and now ranks as the fourth primary cause of mortality globally. Because postprandial glucose levels and insulin secretion are significantly influenced by the nature of dietary carbohydrate intake, the consumption of low-glycemic index (GI) foods which are typically fiber-rich serves as a protective measure against both the development of diabetes and associated cardiovascular complications.