This book explores the potential link between the consumption of highly processed foods and the deterioration of cognitive function. The book begins by establishing an understanding of cognitive function and how it is impacted at a physiological level by ultra-processed foods, which are characterized by extensive manipulation and the addition of preservatives, colours, and other artificial ingredients. To provide a deeper understanding of the relationship between ultra-processed foods and cognitive decline, the authors delve into the historical, economic, and political factors which have shaped the modern food industry. A compelling and informative read for anyone interested in the link between diet and brain health, the book offers a nuanced look at the potential dangers of ultra-processed foods and encourages readers to be more mindful of their diet and lifestyle choices. The book ends by helping readers better understand the risk factors of cognitive decline and laying out practical steps that can be taken to preserve cognitive function and support overall health and well-being.