This seems like an insane default. What’s the rationale?
Mel Gibson even famously was part of an ad campaign to make sure that nobody COULD regulate supplements and to this day there's basically just about anything in those things you can buy at any convenience store.
Republicans aren't against regulation more than Democrats, each side just wants a different set of regulations. Both parties want some level of restrictions on abortion for example, they just disagree on what the regulation should be.
“Starve the beast” in the context of chevron means that regulatory adjudication moves from administrative law judges in agencies to Federal courts. Supposedly this is to align with constitutional principles, but the reality is the except for the richest companies and individuals, litigation in federal court is prohibitively expensive.
You also have to deal with the fact that food processors are fairly powerful and that the number of new foods/additives created a year would swamp the agency and be virtually untestable.
(https://library.weill.cornell.edu/about-us/snake%C2%A0oil%C2...)
I'd personally rather go to the store and assume that most (if not all) the products available are proven to be safe rather than one which can sell anything that no one has yet proven to be unsafe.
Where the US really got off the rails, in my opinion, was holding onto our distaste for regulation while simultaneously providing legal cover for corporstions to become massive and centralize industry so massively.
The FDA shouldn't be necessary at all. I don't need an organization to tell me raw milk from a local dairy is safe. The FDA is only needed for milk because we have a handful of massive, industrial dairies raising animals in terrible conditions and selling their product to everyone through national infrastructure balanced like a house of cards.
And raw milk is one of those things that it's all good and dandy until it's not. I still prefer buying raw milk and doing a LTLT pasteurisation to have the best of both worlds.
A lot of people make a lot of money selling ground up bark and food flavoring.