So I have been on iron (Slow FE, 2 pills a day) for 2 months now and the hair loss doc wants to recheck my ferritin levels. He told me to STOP taking the iron for a week before getting the blood work done. I never heard of this before. I hate to think I am setting myself back in my treatment by stopping for a week! Is this customary to discontinue the iron before the blood work? Is this necessary? Does this make the results more accurate or is it just pointless? (BTW he wants me to do the same to check the copper levels because I have a copper deficiency. I have to stop the copper supplements too) Thank you for any input!