There four steps they refer to in the title are:
- Optimize macronutrition.
- Eat paleo, not toxic.
- Be well nourished.
- Heal and prevent disease.
What I particularly like is that the diet is paleo-ish, but with a twist. For example fermented or fatty dairy are allowed.
What's not allowed are "the four most dangerous foods in Western diets":
- cereal grains,
- vegetable oils, and
- fructose sugar.
So without any further ado, get this gem of a book right away - or if you are not sure yet, go download their free Perfect Health Diet Color Companion (right click to download the PDF) featuring food pictures and images from the book.