Nutrition plays a crucial role in brain health and cognitive performance. A well-balanced diet rich in essential nutrients such as omega-3 fatty acids, antioxidants, vitamins (especially B vitamins), and minerals (like iron and zinc) supports cognitive functions such as memory, concentration, and reasoning. Conversely, poor nutrition, characterized by deficiencies in these nutrients or an excess of unhealthy fats and sugars, can impair brain function and increase the risk of cognitive decline. Research suggests that diets like the Mediterranean diet, which emphasize fruits, vegetables, whole grains, and lean proteins, are associated with better cognitive performance and reduced risk of neurodegenerative diseases. Therefore, maintaining a nutritious diet is not only beneficial for physical health but also crucial for preserving mental acuity and overall brain function throughout life. This book presents researches and studies performed by experts across the globe. The topics included in this book on the role of nutrition in brain health and cognitive performance are of utmost significance and bound to provide incredible insights to readers. It aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.