Abstract: Inflammatory bowel disease (IBD), including ulcerative colitis and Crohn's disease, is a group of chronic, relapsing, immune-mediated gastrointestinal disorders. A major challenge in IBD treatment lies in the heterogeneity of these conditions. Both ulcerative colitis and Crohn's disease are multifactorial, characterized by complex interactions between host genetic susceptibility and environmental factors such as diet and gut microbiota. Genome-wide association studies have identified disease-associated single nucleotide polymorphisms in approximately 100 genes, yet twin studies also clearly demonstrate the significant influence of environmental factors on disease development. However, attempts to link dietary factors with IBD risk based on epidemiological observations have yielded conflicting results. Nevertheless, emerging high-throughput technologies, by integrating entire biological systems, may in the future incorporate nutrient-gene interactions to better classify patient subgroups. In this context, two new scientific fields have emerged: 'Nutrigenetics' and 'Nutrigenomics'. 'Nutrigenetics' studies the influence of genetic variation on nutrient-gene interactions; 'Nutrigenomics' describes the physiological and health status effects of nutrition at the levels of gene transcription, protein expression, and metabolism. It is hoped that the integration of these two research areas will advance the understanding of the complex gene-environment interactions in the etiology of inflammatory bowel disease and, in the long term, promote the realization of personalized nutrition strategies for disease prevention and treatment. This article briefly summarizes relevant data on the effects of nutrients on intestinal inflammation, highlights nutrient-gene interactions, and explores the potential of applying 'omics' technologies in inflammatory bowel disease (IBD) research.