This paper argues for the following four claims: the terms “natural” and “unnatural” are ambiguous. Genetically modified food is unnatural in some senses of the term “unnatural”. Natural food should be favored over unnatural food in some senses of the terms “natural” and “unnatural”. Genetically modified food is not necessarily unnatural in a sense that would offer a good reason for favoring food that is not genetically modified. The claims are defended by distinguishing four different senses of the terms “natural” (...) and “unnatural”. Each sense is analyzed with respect to its moral relevance for food choice. (shrink)