“...the FDA has congressionally authorized jurisdiction.”
Can you point out to me which part of the Constituton gives Congress this jurisdiction that they delegated to the FDA?
So sue them. There are legal precedents dating back to 1911 supporting the 1906 food and drug act as constitutional under the Commerce clause (Hipolite Egg Company v. U.S).
But you're smarter than they are so sue them. Boogieman vs the Supreme court. I'm sure they will quickly see the wisdom of your constitutional scholarship.
Just so you know. If you win, I'd support a Federal Amendment to the Constitution giving them specific authority to regulate food and drugs.