The term "foodstuff" is ambiguous. In one sense it hasa narrow meaning and is limited to articles which are eatenas food for purposes of nutrition and nourishment and sowould exclude ... condiments and spices such as yeast, salt,pepper, baking powder and turmeric. In a wider sense itincludes everything that goes toto the preparation of foodproper (as understood in the narrow sense) to make it morepalatable and digestible. Whether the term is used in aparticular statute in its wider or narrower sense cannot beanswered in the abstract878but must be answered with due regard to the background andcontext.