Iron is a factor involved in the process of blood formation, a component of hemoglobin in red blood cells. Iron deficiency not only leads to anemia but also causes many other human health problems.

Chronic obstructive pulmonary disease (COPD) is a condition in which the airways are blocked slowly and for a long time. This condition causes lung function to gradually decline, manifested by increasing shortness of breath. This is a dangerous disease because the disease progresses in the human body for decades but the patient does not detect the disease. The progression of COPD is in only one direction, which is to get worse over time.