Long story short: About a year ago my ferritin levels were on the floor (4ng/ml, range 15-200ng/ml, I think, not sure), was prescribed ferrous fumarate and the level climbed over the course of about six months to 70ng/ml or so. Since it was at a good level my GP and I agreed that I should drop down to one ff capsule every other day.
It's now time to retest. Which would yield the most useful and / or interesting result: taking the ff right up to the day of the blood test, or stopping a few days beforehand? I can't see my GP going for two tests in a short space of time so can't do both If I were to stop taking the ff a few days before, how many days should I leave between stopping and the blood test?
I realise, now, looking at the range and the last test result, that cutting back probably wasn't warranted at the time and that I was only just where I needed to be (it looked like I was close to the top of the reference range but now I really can't trust my eyes). I'm losing quite a lot of my hair and I hadn't twigged that it might be that my ferritin was too low again (although probably in range). Still, I'd be interested to know which method would give the most interesting result.
Thanks
Jo