No. A key element to the program is to find the foods that work for you but provide good health at the same time. This will make it a lot easier to stick to the program and not feel like a chore. Only once you are comfortable with what you are doing on the program will it be advisable that new foods are tried to introduce variety and more balance to your diet. You will probably find a lot of new foods enjoyable as your taste buds change and no longer crave particular foods.