About the diet of acids: The recommended diet during the course of serious illnesses.
About healthy diet: The diet, in a broad sense, as a factor in maintaining health or treating diseases.
About food: Food and its assimilation by living organisms. Adaptation of Heraclitus' views on perpetual motion and continuous change.
About the usefulness of liquids: Referring to liquids (sweet and salt water, vinegar, wine) and their action. The role of the warm and cold element in the treatment of diseases.