Can you provide a source on the cast iron dust issue. I've heard that cast iron is actually recommended for anemic people who are low in iron. Are there other c

Can you provide a source on the cast iron dust issue. I've heard that cast iron is actually recommended for anemic people who are low in iron. Are there other chemicals besides iron in the "dust"? How's would this dusty be formed unless you are purposely scraping there hell out of it with metal utensils? (And wood is generally recommended for cooking utensils anyway)