People should adhere to a 40-30-30 ratio or 40% carbohydrates, 30% protein, and 30% fats. Once in this zone, blood sugar levels can be maintained and cellular inflammation, which is the cause of disease, can be regulated.
The fats ingested should be good quality fats, some examples include fats that contain omega-6 and omega-3 fatty acids.
The Zone was developed by Dr. Barry Sears. For more information check out http://www.zonediet.com/