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.
Black dyes in foods such as licorice or foods colored with black food coloring can cause your stool to turn black. Other than food coloring or dyes, there is no other food-related reason why your stool would turn black. Black stool can indicate a serious condition, such as blood in your stool.