Pretty sure my local GP has some strong anti-vegan bias. Long story short, I went and got a blood test done a month ago, I got the results back and the doctor said, 'Oh overall it looks like you have fine iron, but when you look at the details, you are lacking. Here, take this iron supplement for three months.'
I asked him if there were like, different forms of dietary iron (as in heme and non-heme), or if the body could like, contain iron, but not metabolise it; you know to account for the discrepancies between my seemingly high results, which still indicated that I was somewhat 'deficient'.
So I got print-out of my results, and compared them to the results of an omnivorous friend who had had an iron test two weeks earlier. She had normal iron levels, albeit on the low-side, but her doctor did not suggest a supplement. When we compared my results however, not only did I score higher than her on all four categories of serum iron, TIBC, transferrin saturation and serum ferritin, I also scored well within the normal range for transferrin saturation and serum ferritin, above the normal-maximum for TIBC (which is the actual absorbency of the iron), and I scored on the high-high-almost-heamacromatosis-end of serum iron.
Go figure.