I believe you only need FDA approval if you sell something as a medical device/treatment etc. If you sell it as <plastic thing> and some residual chemical ends up in someone's bloodstream, that's fine.

This is because millions of chemicals are perpetually floating around in our bloodstreams (and elsewhere).

The FDA may issue warnings and bans. But to do so usually requires some evidence something is harmful. This study does NOT provide any evidence of that. Hence it was a total waste of time and energy.

Edit:

https://www.fda.gov/about-fda/what-we-do

>The Food and Drug Administration is responsible for protecting the public health by ensuring the safety, efficacy, and security of human and veterinary drugs, biological products, and medical devices; and by ensuring the safety of our nation's food supply, cosmetics, and products that emit radiation.

(Goes on to include tobacco and terrorism)