Lactoferrin Dosing Guide: How Much, When, and For How Long

Expert Summary

Lactoferrin dosing varies considerably based on the intended clinical application. The evidence base spans doses from 100 mg/day (pediatric use, iron supplementation in pregnancy) to 1,200 mg/day (experimental cancer applications). For the vast majority of healthy adults using lactoferrin as a longevity, immune, or gut health supplement, 200-300 mg/day is well-supported and cost-effective.

Dose Reference by Application

| Application | Evidence-Based Dose | Source |

| Adult immune support | 200-300 mg/day | Multiple RCTs |

| Gut health (IBD, IBS) | 300-600 mg/day | Gastroenterology trials |

| Iron supplementation | 200-400 mg/day | Paesano et al. 2010 |

| Pregnancy iron support | 200-400 mg/day | Italian multicenter RCT |

| Pediatric immune support | 100-200 mg/day | Japanese and Italian trials |

| H. pylori adjunct | 200 mg twice daily | Lactoferrin + triple therapy RCTs |

| Longevity protocol | 200-300 mg/day | Mechanistic + clinical evidence |

Key Dosing Facts

• Standard adult dose: 200-300 mg/day covers most applications with a favorable cost-to-benefit ratio.
• Between-meal timing: Lactoferrin is best taken 30-60 minutes before or 2 hours after meals. Food — particularly calcium, phosphate, and other proteins — competes with lactoferrin's iron binding and may reduce bioavailability. Morning administration on an empty stomach is a common approach.
• No tolerance or dependency: Unlike some pharmacological iron chelators, lactoferrin does not produce receptor downregulation, rebound iron overload, or dependency. It can be taken continuously without cycling.
• Forms: Enteric-coated capsules protect lactoferrin from gastric acid denaturation and deliver more intact protein to the duodenum and jejunum where iron absorption occurs. Enteric coating may improve efficacy for gut-targeted applications (IBD, H. pylori). Standard capsules are appropriate for systemic immune and inflammatory applications.
• Duration: For acute applications (seasonal immune support, H. pylori adjunct), 1-3 month courses are typical. For longevity and chronic inflammation applications, ongoing daily supplementation is consistent with the evidence base.

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Scientific References

• Legrand D. Overview of Lactoferrin as a Natural Immune Modulator. Journal of Pediatrics. 2016. PMID: 27080757
• Wang B et al. Lactoferrin: structure, function, denaturation and digestion. Critical Reviews in Food Science and Nutrition. 2019