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.
4. Colon cancer: Blood on or in the stool is often the first noticeable sign of present colon cancer. This is why it is essential that any sign of blood on the stool be brought to your doctor's attention. Blood from a cancerous growth in the colon may cause the stool to appear dark, black, or tar-colored. 5.