Also, I did a search for [Abram Hoffer schizophrenia] in PubMed and there were only 2 hits and both questionable. One was from a publication I have never seen mentioned before. See below:

Schizophrenia and cancer: the adrenochrome balanced morphism.
Foster HD, Hoffer A.
Med Hypotheses. 2004;62(3):415-9. doi: 10.1016/S0306-9877(03)00319-0.
PMID: 14975514
These relationships seem compatible with one or more genetic risk factors for schizophrenia that offer(s) a selective advantage against cancer. There is experimental evidence that appears to support this possibility. ...The evidence suggests that there are balanced morphis …

So I have looked up whether Med Hypotheses is a peer-reviewed publication. It is not.

Lack of publications in rigorous peer-reviewed journals would not have boded well for this theory (using this term in its everyday meaning) had Hoffer published at all this hypothesis and his proposed supporting evidence. But he did not publish anything, even in non-peer-reviewed journals.

He did live to the age of 91, which suggests that he might have known a thing or two about longevity. Of course he also could have been dealt a lucky hand of genes. But at least his long lifespan is not inconsistent with attributing knowledge about how to live long to him.