It’s not a prerequisite, but it is correlated. Plenty of people have poor mental health without lead poisoning, but it’s unquestionably true that there are people who would have much better mental health had they not been breathing in lead particles for decades.
You’re so quick to blame lead poisoning when we all know poor mental health and Alzheimer’s is doing all the heavy lifting.
Lead poisoning will lead to poor mental health, just FYI
But it’s not a prerequisite.
It’s not a prerequisite, but it is correlated. Plenty of people have poor mental health without lead poisoning, but it’s unquestionably true that there are people who would have much better mental health had they not been breathing in lead particles for decades.