“The Zone” actually refers to a proper hormone balance, and not specifically a balance of food types. When insulin levels are stable, and glucagon levels are not too high, then specific anti-inflammatory chemicals (types of eicosanoids) are released, which have similar effects to aspirin, but without downsides, such as gastric bleeding. Sears claims that a 30:40 ratio of protein to carbohydrates triggers this effect, and this is called ‘The Zone.’ Sears claims that these natural anti-inflammatories are heart and health friendly.
Other ‘discretionary choices’ are not needed in a healthy diet. This includes: