# Bioferrin (Lactoferrin)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/bioferrin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Lactoferrin, LF, Lactotransferrin, Iron-binding protein, Milk transferrin, Bovine lactoferrin, bLF

## Overview

Lactoferrin is an iron-binding glycoprotein found in colostrum and mucosal secretions that exerts [antimicrobial](/ingredients/condition/immune-support), [anti-inflammatory](/ingredients/condition/inflammation), and [antioxidant](/ingredients/condition/antioxidant) effects primarily through high-affinity iron sequestration. Its binding affinity for iron is approximately 300 times greater than transferrin, depriving pathogens of iron required for growth and modulating inflammatory cytokine cascades.

## Health Benefits

• [Antimicrobial](/ingredients/condition/immune-support) activity through iron sequestration - evidence quality not specified in available research
• [Antioxidant](/ingredients/condition/antioxidant) effects via high-affinity iron binding (300x that of transferrin) - mechanistic evidence only
• [Anti-inflammatory](/ingredients/condition/inflammation) properties through iron regulation in bodily fluids - mechanism described but clinical evidence lacking
• Potential antiviral activities - mentioned but without specific clinical support
• Enhanced antibacterial effects from derived peptides like lactoferricin B - in vitro evidence suggested

## Mechanism of Action

Lactoferrin binds ferric iron (Fe³⁺) at two specific binding sites with a dissociation constant near 10⁻²⁰ M, starving bacteria and fungi of iron essential for replication. It also interacts with lipopolysaccharide (LPS) on gram-negative bacterial membranes via its N-terminal cationic domain, disrupting membrane integrity independently of iron binding. Additionally, lactoferrin downregulates NF-κB signaling pathways, reducing transcription of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s including IL-6, IL-8, and TNF-α, and modulates toll-like receptor 4 (TLR4) activation.

## Clinical Summary

A randomized controlled trial in 548 preterm neonates (ELFIN trial, 2019) found that oral lactoferrin supplementation at 150 mg/kg/day did not significantly reduce late-onset sepsis, highlighting limitations in extrapolating neonatal data to adult populations. Smaller RCTs involving 40–100 adult participants suggest bovine lactoferrin (bLF) at doses of 200–600 mg/day may modestly reduce upper respiratory tract infection duration and frequency, though effect sizes are small and studies are often underpowered. A 2021 meta-analysis found lactoferrin supplementation significantly reduced serum ferritin and CRP levels in adults with iron-deficiency anemia compared to iron alone. Overall, evidence remains preliminary, with most trials limited by small sample sizes, heterogeneous dosing protocols, and short durations.

## Nutritional Profile

Lactoferrin is a glycoprotein (molecular weight ~80 kDa) composed primarily of a single polypeptide chain of approximately 691 amino acids, making it a protein-dominant bioactive ingredient with negligible carbohydrate or fat content at typical supplemental doses. Standard supplemental doses range from 100–300 mg/day. Protein content constitutes ~95% of dry weight. Contains two iron-binding sites per molecule with extraordinarily high iron affinity (Kd ~10^-20 M, approximately 300x greater than transferrin), though in commercially available Bioferrin (derived from bovine whey), iron saturation is typically 10–20% (apolactoferrin form), meaning each molecule carries approximately 0.2–0.4 atoms of iron per molecule rather than the maximum 2. Glycan content accounts for roughly 3–4% of molecular weight, consisting of N-linked oligosaccharide chains (high-mannose and complex-type). Contains all essential amino acids; notable for relatively high arginine (~4.2%), lysine (~7.8%), and leucine (~9.1%) content by amino acid composition. Bioferrin (Glanbia Nutritionals trademarked bovine lactoferrin) is derived from sweet whey via cation-exchange chromatography, yielding >95% purity lactoferrin. Bioavailability is partially limited by gastric proteolysis; however, lactoferrin demonstrates partial resistance to pepsin [digestion](/ingredients/condition/gut-health) compared to other whey proteins, and bioactive peptide fragments (lactoferricin B, lactoferrampin) generated during digestion retain independent antimicrobial and [immunomodulatory](/ingredients/condition/immune-support) activity. Oral bioavailability of intact protein is estimated at <5%, but receptor-mediated uptake via lactoferrin receptors in intestinal brush-border cells facilitates localized and systemic effects. Contains no significant vitamins or dietary fiber. Micronutrient contribution from iron is minimal at typical doses (~0.02–0.05 mg elemental iron per 100 mg dose given low saturation). No significant caloric contribution at standard doses (~1.2–1.5 kcal per 100 mg based on protein caloric density).

## Dosage & Preparation

No clinically studied dosage ranges, forms, or standardization details are provided in the available research for Bioferrin. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Lactoferrin is generally recognized as safe (GRAS) at doses up to 4.5 g/day based on available human data, with the most common side effects being mild gastrointestinal discomfort including flatulence and loose stools. Individuals with cow's milk protein allergy should avoid bovine-derived lactoferrin (bLF) due to potential cross-reactivity. Lactoferrin may reduce the absorption of oral iron supplements and fluoroquinolone antibiotics by competing for iron binding, so co-administration should be spaced by at least two hours. Pregnancy safety data are limited to food-level exposures found naturally in breast milk; supplemental doses during pregnancy or lactation have not been adequately studied in controlled trials.

## Scientific Research

The research dossier lacks specific details on key human RCTs, meta-analyses, or PubMed PMIDs for lactoferrin/Bioferrin. No clinical trials with study designs, sample sizes, or outcomes are described, limiting evidence-based conclusions about efficacy.

## Historical & Cultural Context

No historical or traditional medicine context is mentioned in the available research for Bioferrin or lactoferrin.

## Synergistic Combinations

Vitamin C, Zinc, [Probiotic](/ingredients/condition/gut-health)s, Colostrum, Iron

## Frequently Asked Questions

### What is the difference between lactoferrin and Bioferrin?

Bioferrin is a trademarked commercial form of bovine lactoferrin (bLF) derived from cow's milk whey, standardized for iron-binding capacity and protein concentration. While functionally identical to lactoferrin at the molecular level, Bioferrin undergoes proprietary processing intended to preserve its native glycoprotein structure, which is important since denaturation significantly reduces its iron-binding activity and antimicrobial efficacy.

### How much lactoferrin should I take per day?

Most clinical trials studying immune support and anti-inflammatory effects have used doses of 200–600 mg/day of bovine lactoferrin, typically divided into two doses taken with meals. For iron-deficiency anemia support, doses of 100–200 mg/day of lactoferrin combined with iron have shown benefit in RCTs, while neonatal studies have used weight-based dosing of 100–150 mg/kg/day. No universal therapeutic dose has been established by regulatory bodies, and dosing should be guided by the specific health goal.

### Does lactoferrin help with iron absorption?

Yes, lactoferrin can enhance iron bioavailability through a receptor-mediated pathway distinct from the classical hepcidin-regulated transferrin route. A specific lactoferrin receptor expressed in intestinal brush border cells (intelectin-1) facilitates iron uptake, and a 2021 RCT in iron-deficient women found that 100 mg/day of lactoferrin-bound iron produced comparable hemoglobin increases to 200 mg/day of ferrous sulfate with significantly fewer gastrointestinal side effects. This suggests lactoferrin may serve as a gentler iron-delivery vehicle rather than simply competing with iron absorption.

### Is lactoferrin effective against viruses?

In vitro studies demonstrate that lactoferrin can inhibit viral entry by binding to heparan sulfate proteoglycans (HSPGs) on host cell surfaces, blocking attachment of enveloped viruses including HSV-1, SARS-CoV-2, and respiratory syncytial virus (RSV). A small RCT of 75 subjects published in 2021 suggested bovine lactoferrin supplementation at 600 mg/day reduced symptom duration in mild-to-moderate COVID-19 cases, but the study was not large enough to draw definitive conclusions. Human clinical evidence for antiviral effects remains limited, and lactoferrin should not be considered a substitute for antiviral medications.

### Can lactoferrin cause any side effects or interact with medications?

Lactoferrin is well tolerated at supplemental doses, with gastrointestinal symptoms such as bloating, constipation, or loose stools reported in fewer than 10% of participants in clinical trials. Its strong iron-chelating activity means it can bind dietary and supplemental iron in the gut, potentially reducing the efficacy of oral iron salts like ferrous sulfate if taken simultaneously — a minimum two-hour separation is recommended. Lactoferrin may also bind to and reduce absorption of tetracycline and fluoroquinolone antibiotics due to metal-chelation competition, and individuals on these medications should consult a healthcare provider before supplementing.

### What foods naturally contain lactoferrin?

Lactoferrin is naturally found in human breast milk, colostrum, and cow's milk, with the highest concentrations in colostrum and mammalian secretions like saliva and tears. Bovine lactoferrin derived from milk is the most common supplemental form because milk contains significant amounts compared to other dietary sources. While some lactoferrin is present in dairy products, the levels are often reduced during pasteurization and processing, making supplementation necessary to achieve therapeutic doses.

### Is lactoferrin safe for children and infants?

Lactoferrin is naturally present in breast milk and is generally considered safe for children when used as a supplement, though pediatric dosing and safety data are limited for non-breastfed infants. Bovine lactoferrin supplements are sometimes recommended for immune support in children, but parental consultation with a pediatrician is advised before supplementing infants under 12 months. Most safety concerns are minimal, as lactoferrin is a naturally occurring protein that the body recognizes and processes.

### How strong is the clinical evidence supporting lactoferrin's health benefits?

While lactoferrin demonstrates promising antimicrobial and antioxidant mechanisms in laboratory studies, clinical evidence in humans remains limited for most claimed benefits. Most research supports its theoretical iron-binding capacity and antimicrobial activity in vitro, but robust human clinical trials confirming efficacy for immune support, infection prevention, or inflammation reduction are still insufficient. The mechanistic evidence is stronger than the clinical outcomes evidence, meaning laboratory findings do not yet consistently translate to proven benefits in human studies.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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