The nutrient intake was calculated using a software application linked to the food database of the European Institute of Oncology integrated with the nutrient composition of 60 commercial GF foods. The computer output will consist in the evaluation of the mean daily intake of macro nutrients for each subject, in terms of carbohydrates, protein and lipid. Food items consumed will be also collapsed into food categories; pasta, bread, potatoes, flours, different cereals, fruit, vegetables, milk, cheese, eggs, fish, oils and fats, biscuits, sweet snacks, breakfast cereals, candies, chocolate, soft drinks, juices, coffees, teas, alcoholic beverages. For each subject, the mean daily intake of each food category will be calculated.