Nutrition experts advise against grocery shopping while hungry, but the debate over snacking in supermarkets continues.  While some find it acceptable to sample nonweighted items before purchase, others consider it inappropriate.  Grocery store employees clarify that snacking on certain items is permissible if you pay for them before leaving. However, consuming weighted goods before purchase can lead to revenue losses for small businesses.  The best practice is to pay for your snack before enjoying it and to ask for samples if you want to try new items.