Can I take a serum ferritin test on my first day of menstruation? Why? Information points out ferritin seems different from iron, one is the ability to store iron and one is the blood's iron level. thx
玉英華
醫生回覆
Dear Shan, ferritin level is a measure of the iron store in your body.It doesn’t affect much during menstruation. And iron level is a direct measure of the free iron available in your blood. Both are markers to show whether you have iron deficiency or not.