The iron and our body
Iron is present in the hemoglobin of the red blood cells that carry oxygen to all cells. It is also found in myoglobin, a similar substance to hemoglobin, which helps muscles to put oxygen in reserve. Iron is essential for the production of adenosine triphosphate (ATP), the primary source of body energy. It participates in many vital physiological processes, such as the regulation of cell growth.
The body can not synthesize iron and must tap it from the food. As nature is well made, when the iron stores of the body decreases, its rate of absorption increases. However, when the levels are high, absorption reduces, to protect against the toxic effect of iron excesses in the body.