Iron Deficiency means less than adequate iron levels in the body.

Iron deficiency is the most common cause of anemia (low red blood cell count) worldwide.

Iron is necessary for the formation of hemoglobin and other enzymes. Most iron (70 to 95 percent) in our bodies is present in hemoglobin in circulating red blood cells.

Iron deficiency affects about 10 percent of pre-menopausal women, 6 percent of post-menopausal women, and fewer than 2 percent of men.

Most older people who become deficient do so...