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Benefits of Lactoferrin

Evidence:Moderate
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This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Evidence-Based Benefits

  • Antimicrobial iron sequestration — lactoferrin binds free iron with extremely high affinity, depriving bacteria of the iron essential for their growth and biofilm formation. This mechanism is effective against Staphylococcus, Streptococcus, E. coli, and many other pathogens
  • Antiviral activity — lactoferrin binds to heparan sulfate proteoglycans on cell surfaces, blocking the attachment of viruses including HSV, CMV, hepatitis C, and respiratory viruses before they can enter host cells
  • Immune cell modulation — lactoferrin enhances NK cell cytotoxicity, stimulates neutrophil activation and phagocytosis, and promotes macrophage differentiation, strengthening multiple arms of innate immunity
  • Gut immune support — lactoferrin acts as a prebiotic, promoting Bifidobacterium and Lactobacillus growth while inhibiting pathogenic bacteria, supporting the gut-associated lymphoid tissue (GALT) that houses 70% of immune cells
  • Iron homeostasis — uniquely, lactoferrin improves iron absorption and status without the constipation, nausea, and oxidative stress caused by conventional iron supplements. A 2006 RCT showed lactoferrin was as effective as ferrous sulfate for treating iron deficiency anemia in pregnancy with fewer side effects

What the Research Says

Lactoferrin is a bioactive protein known for its immune-modulating properties and diverse health benefits. Legrand et al. (2005) demonstrated its role in innate immunity, including iron sequestration, membrane disruption, and immune cell activation. Recent studies have further validated lactoferrin's efficacy across various applications.

Mayorga et al. (2025) conducted a systematic review of 25 studies involving 1594 citations, showing that lactoferrin supplementation significantly reduced late-onset sepsis (OR: 0.60) and diarrhea (OR: 0.56) in pediatric populations. Additionally, D'Amico et al. (2023) found that lactoferrin supplementation during pregnancy lowered the risk of preterm birth (<37 weeks) with an OR of 0.43 (95% CI: 0.2-0.9). Berthon et al. (2022) reviewed 25 studies, concluding that lactoferrin reduces systemic inflammation and respiratory tract infection incidence, particularly in children.

Collectively, these findings underscore lactoferrin's role as a versatile supplement supporting immune defense, gut health, and maternal-fetal outcomes.

Related Conditions

Immune FunctionGut Health
Full Lactoferrin Guide

References

  1. ReviewLegrand D, Elass E, Carpentier M, Mazurier J (2005). Lactoferrin: a modulator of immune and inflammatory responses. Cellular and Molecular Life Sciences. DOI PubMed
  2. Meta-analysisMayorga V, Navarro R, Roldan V, Urtecho M, et al. (2025). Efficacy of lactoferrin supplementation in pediatric infections: a systematic review and meta-analysis.. Biochemistry and cell biology = Biochimie et biologie cellulaire. DOI PubMed
  3. Wang Y, Florez ID, Morgan RL, Foroutan F, et al. (2023). Probiotics, Prebiotics, Lactoferrin, and Combination Products for Prevention of Mortality and Morbidity in Preterm Infants: A Systematic Review and Network Meta-Analysis.. JAMA pediatrics. DOI PubMed
  4. Yami HA, Tahmoorespur M, Javadmanesh A, Tazarghi A, et al. (2023). The immunomodulatory effects of lactoferrin and its derived peptides on NF-κB signaling pathway: A systematic review and meta-analysis.. Immunity, inflammation and disease. DOI PubMed
  5. Meta-analysisBerthon BS, Williams LM, Williams EJ, Wood LG (2022). Effect of Lactoferrin Supplementation on Inflammation, Immune Function, and Prevention of Respiratory Tract Infections in Humans: A Systematic Review and Meta-analysis.. Advances in nutrition (Bethesda, Md.). DOI PubMed
  6. Zhao X, Zhang X, Xu T, Luo J, et al. (2022). Comparative Effects between Oral Lactoferrin and Ferrous Sulfate Supplementation on Iron-Deficiency Anemia: A Comprehensive Review and Meta-Analysis of Clinical Trials.. Nutrients. DOI PubMed
  7. Meta-analysisAli AS, Hasan SS, Kow CS, Merchant HA (2021). Lactoferrin reduces the risk of respiratory tract infections: A meta-analysis of randomized controlled trials.. Clinical nutrition ESPEN. DOI PubMed
Show 4 more references
  1. Meta-analysisRazak A, Hussain A (2021). Lactoferrin Supplementation to Prevent Late-Onset Sepsis in Preterm Infants: A Meta-Analysis.. American journal of perinatology. DOI PubMed
  2. Ponzini E, Scotti L, Grandori R, Tavazzi S, et al. (2020). Lactoferrin Concentration in Human Tears and Ocular Diseases: A Meta-Analysis.. Investigative ophthalmology & visual science. DOI PubMed
  3. Dai C, Jiang M, Sun MJ, Cao Q (2020). Fecal Lactoferrin for Assessment of Inflammatory Bowel Disease Activity: A Systematic Review and Meta-Analysis.. Journal of clinical gastroenterology. DOI PubMed
  4. Abu Hashim H, et al. (2022). Role of lactoferrin in preventing preterm birth and pregnancy complications: a systematic review.. Reproductive sciences. DOI PubMed