This report delves into the critical relationship between diets and intestinal health, emphasizing the impact of the gut microbiota on overall well-being. It highlights how balanced diets, rich in essential nutrients and dietary fibers, are crucial for maintaining proper intestinal function and preventing chronic diseases. The report explores the adverse effects of poor diets, including those high in fats, refined flours, and trans fats, which can disrupt the gut microbiota and increase the risk of conditions like irritable bowel syndrome, heart diseases, and certain cancers. It also discusses the benefits of food supplements like probiotics and the importance of considering factors like age, sex, and profession when determining dietary needs. The report concludes that a well-balanced diet is essential for promoting intestinal health, reducing the risk of chronic illnesses, and ultimately, contributing to a longer and healthier life. The report references several studies to support its claims, offering a comprehensive overview of the topic.