The reason that you are not supposed to eat, drink or have anything in your mouth for at least 1 hour prior to collection is to ensure that we have enough buccal cells to complete the test, and to decrease the chance of bacteria growth on the swabs. If there are not enough cells to complete the test or, if the swabs are contaminated with bacteria or mold, then the results will not be released and a recollection will be required. Eating or drinking before sample collection will not change your results.