What does it mean if my kidneys are low functioning and my iron is low. im seeing a kidney doctor in about 2 wks and i have some iron tablets at home im going to start taking again, what causes low iron and low kidney function?going to take iron tabl?

Would NOT start taking iron tablets on own before seeing your kidney dr. Doing so could could impair the correct diagnosis. Deficiency can be from low intake of iron or it's required co-nutrients (folate, B-12, etc), from medical conditions/diseases, from increased loss of iron (microscopic blood loss from stomach or colon), or reduced EPO from kidneys.