Unfortunately, the Zone Diet is very complicated and time-consuming if you’re going to follow it properly. You’ll need to invest in a Zone diet book and a decent set of measuring scales and spoons if you don’t already have them. It ... recommends eliminating some very nutritious foods, which are not only a good source of carbohydrate but are also packed with fibre and important vitamins and minerals. For example, wholegrain cereals are packed with fibre, B vitamins and iron, while cheese is an excellent source of calcium and zinc. It can also be really expensive if you decide to purchase pre-packaged Zone products! As for eating out – if you’re counting Food Blocks, you might as well forget it.