Iron deficiency leads to reduced physical capacity.Important PointsIron deficiency can lead to iron-deficiency anemia. This means that red blood cells arent going to be able to carry as much oxygen to your tissues.Iron deficiency anemia is a common type of anemia ‚¬€ a condition in which blood lacks adequate healthy red blood cells.Red blood cells carry oxygen to the body's tissues. As the name implies, iron deficiency anemia is due to insufficient iron.?Additional Information?Growth retardationThis is linked to zinc deficiency and malnutrition.The compromised immune response Immunodeficiency disorders prevent your body from fighting infections and diseases. This type of disorder makes it easier for you to catch viruses and bacterial infections.Immunodeficiency disorders are either congenital or acquired. A congenital, or primary, the disorder is one individual was born with. An acquired, or secondary, disorder is an individual gets later in life. Acquired disorders are more common than congenital disorders.?Mental retardation This is a condition caused by congenital or early acquired underdevelopment of the psyche with a pronounced lack of intelligence, which makes it difficult or completely impossible for adequate social functioning of the individual.