The "silent killer," diabetes mellitus, has indeed been identified as a significant worldwide medical problem. Dietary management has been shown to be a significant strategy for achieving adequate glycaemic control in diabetes, and nutrition/diet continues to be an important factor in both the management and prevention of the disease. Nutritional genomics, also known as nutrigenomics, is the study of how diets influence how genetic information is expressed in an individual as well as how a person's genetic make-up influences how their body processes nutrients and other bioactive ingredients in food. Given that both diet and genes influence health and illness susceptibility, discovering genes that are influenced by diet and that cause or contribute to chronic diseases could lead to the development of diagnostic tools, tailored intervention, and eventually techniques for preserving health. Studies on nutritional genomics typically focus on eating practices based on gene variations, the importance of gene-nutrient interactions, the links between genes, diet, and phenotypes, and changes in epigenetic state brought on by nutrients. Individual genetic variations and how they react to these functional foods are a key problem. It is now necessary to understand whether nutrients work at the cellular level as a result, which calls for a series of interactions involving nutrients at the protein, metabolic levels and genes. A nutrigenomic approach provides a tool to evaluate the effect of foods on gene/protein expression as well as a snapshot of the genes that are on/off at any one time (the genetic potential). In light of the high prevalence of diabetes mellitus, it is crucial to encourage nutrigenomics research. As a result, the current analysis offers insight into the significance of nutrient-gene interactions in diabetes, as well as their treatment and prevention.