Take iron medicine stool is black how to return a responsibility

Iron supplement medicine stool is black, in most cases is caused by oxidation of iron element into iron sulfide.

Iron supplement medicine is mainly composed of iron element, iron element into the digestive system will react with intestinal bacteria, and then be decomposed into iron sulfide, iron sulfide this substance itself is black, when mixed with stool, can cause stool to become black, generally belongs to the normal situation, in a period of time after withdrawal can alleviate itself, do not worry too much. However, if the symptoms persist, it is not excluded that they are caused by some digestive tract diseases, such as gastric ulcer, duodenal ulcer, etc.