Previously discussed here: https://news.ycombinator.com/item?id=47561711

The fact that there's so much microplastics everywhere that it's hard for us to even study tissue in isolate is already not encouraging.

Also the main finding of concern imo in the original Nature paper wasn't the finding that we have a plastic fork-worth of microplastics in our brains. It's the finding that brain tissue seems to concentrate microplastics at a much higher rate than other tissue in the body

I find it concerning that there seems to be such a concerted effort to downplay the significance of that finding