What do such claims even mean? In science, nothing. We can detect anything in anything in the last 20 years, but lawyer-created groups like Heartland Health Research Alliance Ltd are ready to help the litigators who fund them sue "at the drop of a rat" so any detection in humans - bonus points if they can claim pregnant women - of any chemical that can kill a mouse at 10,000 times a real-world dose is going to get a teary press release sent to the New York Times.
How do they get away with it exploiting journalists when scientists see through it immediately? In the past, I have written about the well-established methodology they use; they first recruit a prominent allied scholar to be the lead author of a paper whose results are known in advance. Then they recruit others to write papers citing the first while the first is in editorial at a journal. Once papers cite the original journal article, even if it is in some pay-to-publish predatory outlet, a press release goes out claiming "emerging evidence"