PFAS are persistent in the environment and difficult for the body to eliminate.

“So it turns out that the only way we can get rid of them is through like non-urinary excretion pathways. So things like sweating, breast milk, ministration, child birth, the gut, you can also um actually like excrete these through stool to some extent. But because they're so hard to get rid of, the halflife of these things is like on the order of years. So when you ingest that chemical, you're looking at like 2 4 6 8 years before you're actually going to get rid of the majority of that chemical.”