> That actually harms the case that it DOES, since you would expect the odds of it causing issues would increase with amount ingested. Not necessarily? The cor

> That actually harms the case that it DOES, since you would expect the odds of it causing issues would increase with amount ingested. Not necessarily? The correlation is observed, and there may be causation, in one, or both, directions, that is all we can conclude from the study. The causality doesn't have to be linear with the amount ingested, few things are linear in biology. For example, one could imagine that a certain amount blocks the development of a particular region of the brain. Ingesting more does not necessarily blocks it "more". There is no evidence that this happens, but it is worth exploring, because schizophrenia is a hell of a condition, and is still largely misunderstood.