Why do people get tired when they dont have enough iron in their diet?

When a person is not eating iron-rich foods sufficient enough for his or her body, the person may become anemic. Anemia is a condition in which the blood does not have enough red blood cells to carry oxygen to the rest of the body. When muscles and other parts of the body do not get oxygen they need, the result is that the person will become fatigued. Other symptoms include: feeling cold, weakness, fainting, breathlessness, dizziness, headache, difficulty concentrating, pale complexion, and abnormal menstrual cycles. While short-term anemia can be fixed easily by a change in eating habits, or taking a supplement, longer-term anemia should not go untreated or without seeing a doctor as over time, the condition can eventually effect the heart, brain and other important organs of the body.