This book, THE ZONE, is the result of many years of research, application and testing. At first it sounds too good to be true, a dietary program that benefits overall health, improves athletic performance, mental acuity, and strongly encourages healing in many serious illnesses. From personal experience I suspect that these claims are, in fact, well founded. Carbohydrates are wonderful clean foods, eat them in abundance. Protein practices vary with the program being advocated.
Some diets recommend large amounts of protein, while other programs say low protein.
Once you have your percent bodyfat you must determine your level of activity using a physical activity table in the book. If he did 1 hour per day of moderate exercise 5 days a week, he would require 120 grams per day. If he did heavy weight training or twice a day intense exercise, he would require 150 grams per day. Great protein sources are lean poultry, all fish, egg whites, fat free cottage cheese, protein drinks, etc. You can measure with scales, or Dr. Sears gives an easy way to approximate portions quickly just by eyesight.