Intestinal health is vital for overall well-being, as the gut is responsible for nutrient absorption and acts as a defense barrier against harmful pathogens. The integrity of the intestinal lining, the balance of gut microbiota, and the regulation of inflammation are critical aspects of intestinal health. Poor intestinal health can lead to conditions like leaky gut syndrome, inflammatory bowel diseases (Crohn’s disease, ulcerative colitis), and irritable bowel syndrome (IBS). Nutritional research in this field focuses on how diet influences gut health, such as the role of fiber in maintaining intestinal integrity and probiotics in supporting microbial balance. Researchers also study the impact of specific nutrients, like vitamin D and omega-3 fatty acids, on reducing intestinal inflammation. By identifying dietary interventions that support gut health, this research contributes to preventing gastrointestinal diseases and promoting overall wellness.