Best Lactoferrin for Immune
Top 1 products ranked
Last reviewed May 2026
Clinical dose: 100–600 mg
Why Lactoferrin for Immune
Lactoferrin plays a supporting role in immune. A naturally occurring iron-binding protein found in milk and colostrum. Best studied for improving iron absorption with fewer side effects than traditional iron supplements, and for supporting immune and gut health. In clinical studies, lactoferrin modulates immune function via macrophage, neutrophil, and NK cell activation.
What dose to look for
Clinical studies typically use 100–600 mg of lactoferrin. 100–300 mg/day for general immune/gut support. 250–600 mg/day for iron deficiency support. Enteric-coated or liposomal forms provide ~10× better absorption than standard capsules. Products below this range may not deliver meaningful results.
What form to look for
Avoid lactoferrin powder — no gastric protection — partially degraded by stomach acid. Avoid colostrum — variable lactoferrin content, not standardized. Look for enteric-coated lactoferrin or liposomal lactoferrin for better absorption.
What the research says
Lactoferrin has moderate clinical evidence for immune benefits. Multiple meta-analyses support iron absorption benefits with fewer side effects than iron supplements Learn more
Clinical research on Lactoferrin
LOW — Strong in vitro antimicrobial activity but limited human clinical trials · 100–300 mg/day (bovine lactoferrin)
- •2021 systematic review found lactoferrin had broad antimicrobial activity against bacteria, viruses, and fungi in vitro. Human RCTs show reduced incidence of late-onset sepsis in preterm infants, but adult respiratory data is scarce. PubMed
- •2020 RCT (54 participants) found bovine lactoferrin reduced common cold incidence and duration in healthy adults, but the study was small and single-center.
- •Mechanism: sequesters iron from pathogens (bacteriostatic), directly disrupts bacterial membranes, and modulates immune cell activity. Most abundant antimicrobial protein in human mucosal secretions.
