Onferrous gluconate to ferrous sulfate conversion Nov. 29, 2018, South Korea Ministhow to take ferrous gluconate tabletsry of Food and Drug Safetiron sodium gluconatey (MFDS) released notification No.2018-98, annferric pyrophosphate 1mgouncing amendments to Korea’s ferrous fumarate folic acid vitamin b12 & zinc tabletsFood Code. Major changes include: