Knowledge deficit (incorrect answers above 50%) was noted in six questions; in descending order these were related to the definition of a ‘free food’ (75.9%), the purpose of testing HbA1C (67.2%), cause of an insulin reaction (67.2%), food that should not be used to treat low blood glucose (58.6%), signs of ketoacidosis (58.6%) and what to do when one starts to have an insulin reaction (51.7%) (Table 4). This evidence concerns the gene INS and diabetes mellitus.