Q. I've heard that excess iron can cause heart disease. Is that true?
A. In the 1980s, studies emerged that linked elevated iron stores to increased risk of heart disease. However, follow-up studies provided mixed support for this connection, finding no association with total iron intake but some link with heme iron intake from animal sources. For now, it is recommended that those who are not at risk of iron deficiency avoid excess iron intake (via iron supplements and highly fortified foods).