Biotica Iron (Trace Element) 30 blisters. Iron: Part of nterviene hemoglobin in transporting oxygen by red blood cells in the blood. Oligotherapy is the use of certain minerals and metals in the treatment of different health problems. These trace elements are involved in very small quantities in biological functions and exchanges necessary to the proper functioning of our body Trace elements mainly involved in the absorption and metabolism of food, the renewal of tissues, in strengthening the body's defenses (system immune) against infection and help reduce allergic reactions. Trace elements allow the preservation of balance in our body.