A book to understand the impact that ultra-processed foods have on our body and brain. For years we have been facing a "new era of food" in which the majority of our calories come from ultra-processed foods, which are industrially created and designed to be addictive. The problem is that we are still not fully aware of what these types of products produce in our body. In these pages, Chris van Tulleken offers us revealing research that will help us understand why the consumption of these foods is related to the development of serious diseases, in addition to contributing to environmental pollution, and what we can do to fight against a system . that makes it difficult for us to make healthier decisions. Under the supervision of colleagues at University College London, the author spent a month eating an 80 percent UPF diet, typical of many children and adults in the United States. As his body became the subject of scientific scrutiny, he spoke to the world's leading experts from academia, agriculture and, most importantly, the food industry itself. But more than teaching him about the experience of food, the diet quenched Chris's own addiction to UPF.