Did a bit of a deep dive a few years ago on this topic, there are hundreds of forever chemicals everywhere that Corps either do not share their studies on them, or have not been fully studied in-depth as far as related medium or long term health issues or for safety. So they will lie my omission. A study might read like, "As far as research completed, (next to 0) we have found no likely known ('cause they didn't look hard enough, or for long enough because it is expensive) health risks associated with compound XYZ at minimal or reasonable human exposure." Well, they may not be "lying" if they barely looked, right? Albeit sometimes they will lie, anyways.
It is quite shocking but makes sense when you think some Corps --and the top people within them-- can or will behave like psychopaths in their desire for profit.
They may only do serious studies if people/workers start developing illness or cancer or what not. And this is mostly to figure out their prospects on legal liability, not out the kindness of their hearts. Obviously.
For example:
"The penalty DuPont will reportedly pay for covering up its pollution of newborn American babies with the cancer-causing Teflon chemical will likely be $15 million. This sum amounts to just 8 percent of the maximum allowable fine.
On April 28, Environmental Protection Agency (EPA) Administrative Law Judge Barbara A. Gunning granted EPA and DuPont until August 15 to formally announce their deal. DuPont's indestructible, toxic Teflon chemical is in the blood of over 95 percent of Americans."
People should be outraged. But the average America is completely out of the loop. Their answer when confronted as to why most Americans have Teflon chemicals in their blood was originally that they saw no side effects with that, so too bad, GTFO. No liability on their side, until workers started developing health issues.