Shri Hansaji gives the 7 rules one must practice to live a healthy life. She devotes a chapter to Diet, what one must eat and the proportion of fruits, vegetables, legumes , beans in the Diet. She stresses the importance of Vitamins, Minerals, Proteins and Carbohydrates.
There is an entire two chapters on the Yoga Asanas or Postures for a good and balanced life.
A really nice book that everyone should read or have.