Lactoferrin

Multifunctional iron-binding glycoprotein with powerful antimicrobial, antiviral, and immune-modulating properties

Scientific nameLactoferrin FormulaC2711H4304N752O806S16Fe2 Molecular weight80000 g/mol CAS146897-68-9

70 absorption score

9 safety / 10

60 USD per month

5 documented interactions

Check it against something

Evidence level B

Lactoferrin with:

78 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Powerful antimicrobial and antiviral activity

Inhibits growth of bacteria, viruses, fungi, and parasites

Iron chelation and direct pathogen membrane disruption Evidence A-grade 1-2 weeks for immune enhancement

Enhanced immune system function

Modulates immune response and enhances white blood cell activity

Stimulates immune cell proliferation and cytokine production Evidence A-grade 2-4 weeks for immune improvements

Improved iron absorption and regulation

Optimizes iron utilization while preventing iron overload

Controlled iron delivery to cells and tissues Evidence A-grade 2-6 weeks for iron status improvement

Gut health and microbiome support

Promotes beneficial bacteria while inhibiting pathogenic microbes

Selective antimicrobial activity favoring healthy gut flora Evidence B-grade 2-4 weeks for digestive benefits

Anti-inflammatory and antioxidant effects

Reduces inflammation and protects against oxidative stress

Scavenges free radicals and modulates inflammatory pathways Evidence B-grade 2-6 weeks for anti-inflammatory benefits

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 60% Vitamin D3 Bone health & immune support 1000-2000 IU A 85% Zinc Picolinate Superior immune & healing support 15-30 mg A 95% L-Lysine Immune support & collagen synthesis 1-3g A 90% Oregano Oil Powerful respiratory antimicrobial 100-300mg B 85% Oregano Oil for Antimicrobial Protection Antimicrobial & pathogen defense 1-3 drops diluted daily B 75%

Every pair we checked

12 combinations scored by the engine

Lactoferrin + Calcium Carbonate High calcium may interfere with lactoferrin absorption Needs attention 61

Lactoferrin + Caffeine No documented interaction either way No known interaction 70

Lactoferrin + Creatine Monohydrate No documented interaction either way No known interaction 70

Lactoferrin + Whey Protein No documented interaction either way No known interaction 70

Lactoferrin + Lactase No documented interaction either way No known interaction 70

Lactoferrin + Bovine Collagen No documented interaction either way No known interaction 70

Lactoferrin + DHA No documented interaction either way No known interaction 70

Lactoferrin + Turmeric No documented interaction either way No known interaction 70

Lactoferrin + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70

Lactoferrin + Vitamin D3 Enhanced iron absorption and immune function Works better together 78

Lactoferrin + Lactobacillus acidophilus Complementary gut health and immune support Works better together 78

Lactoferrin + Zinc Gluconate Synergistic immune system enhancement Works better together 78

Dosage

Empty stomach for best absorption

Daily100-400mg

Immune support100-400mg daily

Infection prevention200-400mg daily

Iron absorption100-300mg daily

Gut health100-300mg daily

When to expect it

First Effects1-2 weeks for initial immune and antimicrobial benefits

Peak Benefits4-8 weeks for full immune modulation and health effects

Deficiency DevelopmentNot essential nutrient but low levels associated with infections

Toxicity OnsetNo known toxicity - very safe with normal dosing

How to measure it

$150-250

MarkerLactoferrin levels, immune markers, iron status, inflammatory markers

OptimalEnhanced immune function, balanced iron status, reduced inflammation

Deficient belowLow immune markers, poor infection resistance

FrequencyMonitor immune and iron status every 3-6 months

What people actually reported to the FDA

CAERS, 1 reports naming it as the suspect

Most reported effects

Abdominal pain upper 1

Alanine aminotransferase increased 1

Aspartate aminotransferase increased 1

Hepatic enzyme increased 1

Hepatic pain 1

Named as the suspect 1 reports of 1 that mention it at all

Serious outcome 100% hospitalisation, emergency room or worse

Other Serious or Important Medical Event1

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Absorption High 70 of 100 · absorbs well relative to other forms

Delivered daily 175 mg

Cost per 100 mg delivered $1.14 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Vitamin C

Enhanced iron absorption and immune function

Vitamin C supports iron utilization and immune cell function · level B

Probiotics

Complementary gut health and immune support

Both support healthy microbiome and immune function · level B

Zinc

Synergistic immune system enhancement

Both essential for optimal immune cell function · level B

What not to take with Lactoferrin

2 documented

Excess Iron Supplements

High iron may reduce lactoferrin's iron-binding benefits

Iron saturation may limit lactoferrin's antimicrobial activity · minor significance

Calcium High Doses

High calcium may interfere with lactoferrin absorption

Potential mineral competition for absorption · minor significance

Medication interactions

Discuss these with a pharmacist before combining

iron-supplements Minor

May enhance iron absorption and utilization

What to do: Monitor iron status to prevent overload

immunosuppressants Minor

May counter immunosuppressive effects

What to do: Monitor immune function

Available forms

bioavailability compared

Bovine Lactoferrin 70

Human Recombinant Lactoferrin 85

Bovine Lactoferrin: Most researched, Good availability, Proven benefits, Cost-effective

Human Recombinant Lactoferrin: Identical to human, Highest bioactivity, No dairy allergens, Premium quality

Food sources

before you supplement

Breast milk 1-7 mg/mL (highest concentration) · 90

Cow's milk 0.02-0.35 mg/mL · 60

Tears and saliva 1-3 mg/mL · 85

Lactoferrin supplements 100-500mg per serving · 70

Too little

deficiency signs

Not an essential nutrient but low levels associated with:
Increased susceptibility to infections
Poor immune response and recovery
Iron absorption difficulties
Compromised gut barrier function
Increased inflammation
Reduced antimicrobial defense

Too much

toxicity signs

Excellent safety profile - rare concerns:
Mild digestive upset with very high doses
Theoretical iron accumulation with excessive use
Rare allergic reactions in dairy-sensitive individuals
Generally very well tolerated

Who benefits most

immune-system-enhancement

Powerful immune modulation and antimicrobial protection

100-400mg daily

frequent-infections-prevention

Reduces frequency and severity of bacterial and viral infections

200-400mg daily

iron-deficiency-anemia

Improves iron absorption and utilization

100-300mg daily

gut-health-digestive-support

Promotes healthy gut microbiome and intestinal barrier

100-300mg daily

athletic-performance-recovery

Supports immune function and iron status in athletes

200-400mg daily

Where to buy it

compare forms first

Look for Lactoferrin at 100-400mg per serving. The form that matters here is Bovine Lactoferrin.

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How it works

Chelates iron preventing bacterial and viral proliferation
Direct antimicrobial activity through membrane disruption
Modulates immune cell activity and cytokine production
Enhances iron absorption while preventing overload
Supports gut barrier function and healthy microbiome
Scavenges free radicals providing antioxidant protection

Key findings

what the evidence supports

Powerful antimicrobial activity against bacteria, viruses, and fungi (Nutrients 2020)
Enhances immune function and reduces infection frequency (Clinical Nutrition 2019)
Improves iron absorption and prevents iron overload (Iron Biology 2018)
Supports gut health and beneficial microbiome (Gut Microbes 2021)

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Lactoferrin?

Documented effects: Powerful antimicrobial and antiviral activity; Enhanced immune system function; Improved iron absorption and regulation; Gut health and microbiome support. Inhibits growth of bacteria, viruses, fungi, and parasites

How much Lactoferrin should you take per day?

The common daily range is 100-400mg. By goal — immune support: 100-400mg daily; infection prevention: 200-400mg daily; iron absorption: 100-300mg daily; gut health: 100-300mg daily.

When is the best time to take Lactoferrin?

Empty stomach for best absorption. First effects are typically reported within 1-2 weeks for initial immune and antimicrobial benefits.

What are the side effects of Lactoferrin?

At excessive doses: Excellent safety profile - rare concerns:, Mild digestive upset with very high doses, Theoretical iron accumulation with excessive use, Rare allergic reactions in dairy-sensitive individuals, Generally very well tolerated. Safety rating at normal doses is 9 out of 10.

What should you not take with Lactoferrin?

Separate it from Excess Iron Supplements, Calcium High Doses by two to four hours. High iron may reduce lactoferrin's iron-binding benefits

Does Lactoferrin interact with medications?

Documented interactions with iron-supplements, immunosuppressants. Discuss these with a pharmacist before combining.

How do you know if you need Lactoferrin?

The marker is Lactoferrin levels, immune markers, iron status, inflammatory markers, optimal range Enhanced immune function, balanced iron status, reduced inflammation. Common deficiency signs: Not an essential nutrient but low levels associated with:, Increased susceptibility to infections, Poor immune response and recovery, Iron absorption difficulties.

Taken for

59 Immunity

Vitamin D3 · Vitamin C (Ascorbic Acid) · Comprehensive Immune Support Complex