Iron makes up a part of red blood cells that helps to carry oxygen in our body. Children below 5 years of age and teenagers are at a higher risk of iron deficiency due to their increased iron needs for growth. Teenage girls also have higher iron requirements after menarche (the first menstrual cycle).
Iron-deficiency anaemia occurs in those with more severe deficiency, and is related to frequent infections, poor weight gain, impaired cognitive and psychomotor performance and behaviour disorders.