> compares them to a control group

Good luck finding a single person on earth (let alone, a group) not exposed to microplastics.

The “forever chemicals” were found in even the most remote areas of the world. Wind, rain, storms, and other natural events carry this junk and spread it all over the world.

There is literally a massive plastic graveyard in the ocean. Plastics turning into micro/nano plastics. Infiltrating food (fish), water, and carried into populations.