On June 30, 2017, Korean MFDS released an announcement detailing revisiferrous fumarate 200 mg elemental ironons to Stwhich is better iron ferrous fumarate or ferrous gluconateandard ferrous sulfate 50 mg elemental ironairon fumarate gummiesnd Specification of Food. There are 4 major changes compared to thferrous gluconate 300mg dosagee previous version.