Why Is My Poop Black? 7 Causes of Black Stool

6. Iron supplements

Supplements containing a large dose of Iron can often cause black stool.  Iron supplements are often used to treat and prevent iron deficiency including iron deficiency anemia . For prevention, they are only recommended in those with poor absorption, heavy menstrual periods, pregnancy, hemodialysis, or a diet low in iron.

Written by Cassandra Williams

Cassandra Williams is a Senior Editing Manager at A2ZHealthy