You can use Weight Loss Resources to follow the Zone diet by setting your target nutrition profile (in the Food Diary) to the 40:30:30 ratio. 40% of calories from carbohydrate, 30% from protein and 30% from fat. Start a free trial to try it out.Alternatively log on to the Zone Perfect web site for more information.t least thatâs what Barry Sears, creator of The Zone Diet, tells us! In the mid 1990âs, the Zone was all the rage with many celebs, including Jennifer Aniston and hubby Brad Pitt, all claiming to be fans of the plan.