Nutrigenomics focuses on comprehending the intricate relationship between genomics and nutrition, with a specific emphasis on tailoring dietary strategies to prevent diet-related diseases. Macro and micro-nutrients play a crucial role in maintaining body equilibrium, and any alterations in their intake can disrupt gene regulation, potentially leading to conditions like diabetes. Genes like LIPC, APOA, PPAR, and MTHR significantly influence the development of cardiovascular disease, with their impact being shaped by both diet and environmental factors. Poor nutrition, including factors like saturated fats and moderate meat consumption, contributes to a substantial portion of cancer cases, while certain phytochemicals in food can epigenetically reduce cancer susceptibility. Moreover, dietary components assist in the detoxification of toxins and induce cancer cells to undergo apoptosis. Food intolerances can arise from either the food itself or the host’s physiological response, underscoring the importance of understanding individual reactions to different nutrients. Patients with Non-Alcoholic Fatty Liver Disease (NAFLD) often consume suboptimal nutrients, potentially exacerbating their condition. Insufficient micronutrients can pose risks to the genome, leading to birth defects or increased cancer susceptibility, particularly in developing children or fetuses. The chapter highlights the need for a personalized approach to nutrition, considering individual genetic factors and physiological responses to specific dietary components. Overall, the intricate interplay between genetics, nutrition, and environmental factors has a substantial impact on health benefits, emphasizing the importance of tailored dietary strategies in disease prevention.