Three years ago, the diabetic nurse looked at my iron levels and said "How much do you Drink? " when I replied none at all, I'm not even sure she believed me. A doctor a few days later fortunately had heard of Haemochromatosis. It's very serious, potentially fatal if untreated. The iron poisons all the internal organs, though it is very variable between individuals; some are unaffected. If left long enough, it destroys the pancreatic cells, so producing a form of diabetes very close to type 1. If it hasn't gone that far, the iron interferes with the insulin-sugar reaction, so producing "Type 2", but it is said to be "therapy resistant", as it was in my case. Diagnosis of Haemochromatosis is now by genetic tests and therefore fairly definite. Get tested as soon as possible. Treatment is by venesection, i.e. blood letting. It's just like donating blood, almost painless, and should have no side effects.