"Erna in the Land of Milk and Honey" tells the fictional, sometimes fantastical story of Erna and Jan, who meet while studying. This narrative serves as a framework for scientifically accurate information about human nutrition and the production of modern food. The information is complemented by side notes and illustrations that are sometimes quirky, sometimes interesting, or simply amusing. A particular focus is placed on the relationship between food components and substances that perform specific functions in the body, such as enzymes and signaling molecules.