I'm resurrecting this thread as I continue to search for answers.
I haven't been right since I took iron supplements in August of 2013. Without going into details, all hell broke loose in my body. I had various symptoms on and off immediately after that until full blown SFN reared its ugly head in early November.
I took iron supplements because I turned up with low ferritin (iron stores) in my annual physical. I'd been having symptoms, but didn't realize what it was. I'm sure the low ferritin was the result of a double red blood donation in March that I didn't recover from.
I of course stopped being a regular blood donor once that happened, and then my serum iron levels spiked high in my last annual physical. I'm a carrier of hemochromatosis, and apparently it's not uncommon to for us to run high. I immediately went out and donated blood again...no double reds, just a regular pint.
For those who don't know, hemochromatosis is the most inherited genetic disease in humans. It's not at all uncommon.
So I'm throwing this out there because I just read this:
"We conclude that an idiopathic polyneuropathy was diagnosed in a relative large number of patients with HH (26%), but the causal relationship needs to be confirmed in larger series."
I'm going to continue to look into it and see if any further studies have been done.