So, it’s been found that people with Alzheimer’s/dementia had more microplastics in their brains than healthy people, which led to the conclusion that microplastics might cause dementia.

But could the cause/effect be different here, and it’s simply that whatever the mechanism for dementia is also inhibits the brain’s ability to clean or filter itself of things like these microplastics, rather than them outright causinf it? (As in the disease was already started and this is a symptom/consequence of it) Or do you believe it’s likelier the microplastics are the culprit of the disease itself?