Lactoferrin: A promising treatment for iron deficiency anemia
Iron deficiency anemia (IDA) is the most common nutritional deficiency in the world, affecting more than 2 billion people globally.[1] It occurs when the body does not have enough available iron to produce healthy red blood cells, which can lead to symptoms such as fatigue, weakness, dizziness, shortness of breath, hair loss, headaches, and difficulty concentrating.
For many years, the standard treatment for iron deficiency anemia has been oral iron supplements. While these supplements can help raise iron levels, they are also well known for causing side effects like nausea, constipation, stomach pain, bloating, and dark stools and some patients may not be able to achieve normal levels with oral replacement.[2][3] Because of these symptoms, many people struggle to tolerate traditional iron therapy.
Lactoferrin is emerging as a promising alternative that may improve iron levels while being gentler on the digestive system and a more root cause solution.
What Is Lactoferrin?
Lactoferrin is a naturally occurring protein that binds and transports iron. It is found in human breast milk, cow’s milk, and several other body fluids, and it also plays an important role in the immune system.[4]
The form used in supplements and clinical studies is typically bovine lactoferrin, which is derived from cow’s milk.
What makes lactoferrin unique is that it does not simply work by “adding more iron” into the body. Instead, it appears to help the body regulate and utilize iron more effectively.
Understanding Iron Regulation and Hepcidin
To understand why lactoferrin may work differently than standard iron supplements, it helps to understand a hormone called hepcidin.
Hepcidin is produced by the liver and acts as the body’s master regulator of iron balance.[5][6] When hepcidin levels are elevated, iron becomes trapped inside cells and is less available for making red blood cells. This commonly happens during inflammation, infections, chronic illness, or immune activation.
In these situations, someone may have symptoms and lab findings consistent with iron deficiency even though iron is technically present in the body but it is simply “locked away” and unavailable for use.
This is one reason why some people do not respond well to traditional iron supplements.
How Lactoferrin May Help
Research suggests that lactoferrin may help lower inflammatory signaling in the body, particularly a cytokine called interleukin-6 (IL-6), which is one of the major drivers of hepcidin production.[7][2]
When IL-6 and hepcidin levels decrease, the body may be better able to release stored iron back into circulation so it can be used for red blood cell production.
In one clinical study involving women with anemia associated with inflammation, lactoferrin supplementation significantly reduced IL-6 and hepcidin levels while improving hemoglobin, serum iron, and ferritin.[7] Interestingly, ferrous sulfate did not produce the same improvements in inflammatory markers in that study.[2]
Less Iron, Yet Good Results
One of the most fascinating aspects of lactoferrin research is that lactoferrin supplements contain only tiny amounts of elemental iron compared to standard iron tablets.
A typical ferrous sulfate supplement may contain over 100 mg of elemental iron, while a dose of lactoferrin contains only a fraction of that amount.[7] Despite this, studies have shown comparable and sometimes superior improvements in iron levels and markers.
This suggests that improving iron regulation and absorption may, in some cases, be more important than simply increasing iron intake.
What Does the Research Show?
Research on lactoferrin has been especially promising in pregnant women with iron deficiency anemia.
A meta-analysis of randomized controlled trials found that bovine lactoferrin improved hemoglobin and iron markers while causing significantly fewer gastrointestinal side effects compared to ferrous sulfate.[3]
Patients taking lactoferrin also tended to tolerate treatment better, which may improve long-term adherence.
Emerging research also suggests potential benefits in individuals with anemia associated with chronic inflammation, though more studies are still needed.
Potential Advantages of Lactoferrin
Compared to traditional iron supplements, lactoferrin may offer several potential benefits:
Better gastrointestinal tolerability
Less constipation and nausea
Improved iron regulation
Support for healthy immune balance
Potential benefit in inflammatory states where iron is poorly utilized
Important Considerations
Although lactoferrin appears promising, it is not appropriate for everyone, and iron deficiency anemia should always be properly evaluated. Low iron can result from many underlying causes, including:
Heavy menstrual bleeding
Pregnancy
Gastrointestinal blood loss
Poor dietary intake
Malabsorption
Chronic inflammation or infection
Identifying and addressing the root cause is essential.
Lactoferrin should also not replace medical evaluation for severe anemia or unexplained iron deficiency.
The Bottom Line
Lactoferrin represents an exciting shift in how we think about iron deficiency anemia. Rather than simply forcing more iron into the body, it may help restore the body’s natural ability to regulate and use iron effectively.
For individuals who cannot tolerate traditional iron supplements, or who struggle with inflammatory conditions that interfere with iron metabolism, lactoferrin may be a good option to discuss with a healthcare practitioner.
References
Paesano R, Natalizi T, Berlutti F, Valenti P. Body Iron Delocalization: The Serious Drawback in Iron Disorders in Both Developing and Developed Countries. Pathogens and Global Health. 2012;106(4):200–216.
Paesano R, Berlutti F, Pietropaoli M, et al. Lactoferrin Efficacy Versus Ferrous Sulfate in Curing Iron Deficiency and Iron Deficiency Anemia in Pregnant Women. Biometals. 2010;23(3):411–417.
Abu Hashim H, Foda O, Ghayaty E. Lactoferrin or Ferrous Salts for Iron Deficiency Anemia in Pregnancy: A Meta-Analysis of Randomized Trials. European Journal of Obstetrics, Gynecology, and Reproductive Biology. 2017;219:45–52.
Ianiro G, Rosa L, Bonaccorsi di Patti MC, et al. Lactoferrin: From the Structure to the Functional Orchestration of Iron Homeostasis. Biometals. 2023;36(3):391–416.
Wang CY, Babitt JL. Liver Iron Sensing and Body Iron Homeostasis. Blood. 2019;133(1):18–29.
Xu Y, Alfaro-Magallanes VM, Babitt JL. Physiological and Pathophysiological Mechanisms of Hepcidin Regulation: Clinical Implications for Iron Disorders. British Journal of Haematology. 2021;193(5):882–893.
Lepanto MS, Rosa L, Cutone A, et al. Efficacy of Lactoferrin Oral Administration in the Treatment of Anemia and Anemia of Inflammation in Pregnant and Non-Pregnant Women: An Interventional Study. Frontiers in Immunology. 2018;9:2123.
