Text in Arabic. This collection presents the most recent research examining the details of the metabolic process and tests new approaches, some of which can be applied to how we think about diet and exercise today. This in-depth exploration of traditional weight loss advice includes scientifically-backed explanations on a wide variety of sub-topics, like Why Your Brain Needs Exercise, which looks at the benefits of exercise in an evolutionary context; and Obesity on the Brain, which examines the effects of ultraprocessed foods on brain functions.