Yes, food product labels require an ingredients listing.  The Missouri Food Code section 3-602.11, requires that foods sold directly to the end consumer in a packaged form be labeled. The label requirements include “If made from two (2) or more ingredients, a list of ingredients in descending order of predominance by weight, including a declaration of artificial color or flavor and chemical preservatives, if contained in the food.” This allows the consumer to make an informed decision about whether they can safely eat a food if they have allergies.