Why Does My Poop Smell Like Metal?

Inside your gut, tiny bacteria called microbes help break down the food you eat. When you take iron supplements, the extra iron can change how these microbes work and sometimes cause your poop to have a metal-like smell. Iron has its own strong odor, and when it mixes with the natural process of digestion, it can make your stool smell metallic. Bleeding in your stomach or intestines can also cause this smell as blood is rich in iron. If you develop stool with a metallic smell, particularly if associated with other symptoms like abdominal pain or fatigue, it is a good idea to talk with a doctor.