These groups have statistically high levels of depression, alcoholism, Crohn's disease, cystic fibrosis, and schizophrenia. They should return to the foods of their ancestors. Seafood also contains lithium. Ph.D.,says Hemochromatosis can produce symptoms of schizophrenia. It is not an uncommon illness, hereditarily transmitted and associated with oral ingestion of iron.
Ferritin is storage iron and in the brain can impair function.
This can be tested. Deferoxamine chelates out the iron along with removing blood for transfusions. Iron is a powerful oxidant in the brain and needs to be removed. Other symptoms are joint pains, abdominal pain, tinnitus, heart disease, and disordered glucose metabolism. High vegetable and fish fat intake results in a good outcome.