Both Lead and Asbestos have proof. As does Tobacco.

Literally this meme has two chemicals (lead and asbestos) with huge amounts of studies and proof demonstrating the cancer you get when you hang around it.

When we start talking about iffy as shit / bullshit pseudo science like BPA and Microplastic (whatever the fuck that fake chemical means) we are well into fake science that there will never be proof because y’all can’t even list off a chemical name correctly.