One of the side benefits of the zone diet is weight loss in those who need it. If you are looking to lose weight while eating a healthy, well balanced diet, you might want to look into the zone diet plan. What is the Zone Diet, you may be asking. The Zone diet became popular when its creator, Barry Sears, published the Zone Diet book. This book outlined an eating plan that balanced the ratio between protein and carbohydrate intake in the person's diet.