This article points in the opposite direction but it’s worth keeping in mind that we will see other age related diseases on the rise, just because we get better are curing other diseases. We will all die of something and if we get better at treating cancer, then some other disease will mechanically increase. That’s why I would also take with a pinch of salt studies that show a modest increase in a particular disease and try to pin that on a particular technology or food.

Could this be related to phasing out lead in gasoline in the 80s?

Interestingly each epoch they look at would have had less exposure than the previous and dementia is going down in each epoch.

Title edit: 2016