The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
That means that if a local farmer wants to sell hyper-organic meat that doesn't have certain USDA-mandated chemicals, they should be allowed to as long as they don't export it across state lines.
That also means that if Pfizer wants to make a drug in my state and sell it here, I don't want the FDA involved. I'll take the bad with the good.
While we're at it, I don't see anything in the constitution about banning Marijuana either, I think they do that under the modern reading of the commerce clause too.
Sure, but you're really only mandating 50 factories instead of banning them.