You may have noticed after taking iron that your stools have turned black or dark green. While your first reaction might be, “Yikes! Something might be wrong,” don’t be alarmed.
Other things that may cause black stools include:
Check with your doctor or healthcare provider to find the cause of black stools.
1. Michael F. Picco, M.D. Mayo Foundation for Medical Education and Research (MFMER). Stool color: When to worry. Retrieved from: http: http://www.mayoclinic.com/health/stool-color/AN00772/METHOD=print May 7, 2012.