From p. 1097 of Murray Rothbard’s Man, Economy, and State with Power and Market (two books in one, and available for free):
[T]he government defines “bread” as being of a certain composition. This is supposed to be a safeguard against “adulteration,” but in fact it prohibits improvement.
Considering similar regulations for the size of holes in Swiss cheese, the definitions of certain kinds of pasta, and hunreds of other rules, it is a minor miracle that food innovation happens at all. Fortunately, people can make up new words faster than the government can regulate them.