Selenium is a trace mineral.
The highest selenium levels are found in the liver, kidney, heart, and spleen.
Arthritis: Selenium supplements might reduce free-radical damage to the joints of people with rheumatoid arthritis.
Birth Defects: Women with low selenium levels are more likely to give birth to babies with neural tube defects.
Cancer: People who eat selenium-rich diets or take selenium supplements might be less likely to develop cancer.
Mood: Individuals with low selenium levels might be more prone to depression.