Muslims must also ensure that all foods (particularly processed foods), as well as non-food items like cosmetics and pharmaceuticals, are "halal". Frequently, these products contain animal by-products or other ingredients that are not permissible for Muslims to eat or use on their bodies. Foods which are not considered "halal" for Muslims to consume include blood and intoxicants such as alcoholic beverages. A Muslim who would otherwise starve to death is allowed to eat non-"halal" food if there is no "halal" food available. During airplane flights Muslims will usually order kosher food (if halal food is not available) to assure their chosen dish will not have any pork ingredients.