Transferrin
Transferrin is the protein that binds iron and carries it through the blood.
Transferrin is the protein that binds iron and carries it through the blood. It is made in the liver and delivers iron to the bone marrow, where red blood cells are formed, and to other cells. The body makes more transferrin when iron stores are low and less when they are full. Retesting shows how it changes over time.
Low iron intake, blood loss through heavy periods or frequent blood donation, pregnancy and the contraceptive pill tend to raise transferrin. Inflammation after a recent infection, low protein intake and a lot of iron from supplements tend to lower it.
Foods that help
Iron-rich foods such as red meat, poultry, fish, shellfish, legumes, tofu and dark leafy greens, with enough protein. Vitamin C from fruit, berries and vegetables at the same meal helps the body take up iron from plant foods.
Foods to limit
Coffee and tea with iron-rich meals, and large amounts of calcium at the same meal, reduce iron uptake. Large amounts of alcohol and iron supplements without a clear need.
Track it through the year
One value is a snapshot. Following it up shows whether what you changed is working.
Related markers
Educational information only — not a diagnosis. Every result is checked against safe limits, and anything critical is escalated for follow-up.
See all 84 markers →