Peanut butter, as defined by the U.S. FDA's Standard of Identity, must consist of at least 90 percent peanuts with no more than 10 percent by weight seasoning and stabilizing ingredients. These optional ingredients may include salt, sugars and partially hydrogenated vegetable oil. They may not include lard or other animal fats, artificial flavorings, artificial sweeteners, chemical preservatives or colors.
"Natural" peanut butter should have one ingredient: Peanuts