This book goes into detail about Vitamins, Minerals, Trace Elements, Cell Salts, Proteins, and Carbohydrates. What this book gives you is a break down for each Vitamin, etc. the food sources to eat, how your body will act and what functions are involved when it is healthy, and deficiencies (symptoms) explaining how your body will react when there is not enough in your system. There is a page that shares how to apply this knowledge. Great book!