Stress and Your Heart. More research is needed to determine how stress contributes to heart disease â the leading killer of Americans. But stress may affect behaviors and factors that increase heart disease risk: high blood pressure and cholesterol levels, smoking, physical inactivity and overeating.
Black or dark stools are a common side effect that may be the harmless result of unabsorbed iron. Whether you are taking iron supplements alone or a multivitamin with iron, you may experience this. Check with your doctor or healthcare provider to find the cause of black stools.
1 Blood in your stool. 2  Dark-black, foul-smelling stool that looks like tar (However, tell your doctor if you have been taking over-the-counter medications, such as Pepto-Bismol, which can also make the stool look darker than usual.). 3  Mucus passed with no stool.