Allergen information for food labels must be clear, concise, and consistent. This means that allergen statements should be easily visible on a product label. The presence of allergens must be indicated in the list of ingredients, at the end of the list with a statement to indicate which part of the product was used, or in the statement “contains X” near the ingredient list. In addition, precautionary statements such as “may contain X” are used when there is a potential risk of cross-contamination, although this may not always be required by law.