Serum iron

Serum iron measures the amount of iron circulating in the blood. Iron is an essential mineral vital for numerous bodily functions, most notably for the formation of hemoglobin, the protein in red blood cells that transports oxygen from the lungs to the body's tissues. It also plays a crucial role in cellular energy production, DNA synthesis, and immune system function. Serum iron levels fluctuate throughout the day and can be influenced by diet and other factors. It is often evaluated in conjunction with other iron-related tests, such as ferritin and transferrin, to provide a comprehensive assessment of the body's iron status.