Alpha-Defensin vs Lactoferricin

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Alpha-Defensin

Alpha-defensins are small cationic peptides that are key components of the innate immune system. They have broad-spectrum antimicrobial activity against bacteria, fungi, and some viruses.

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Lactoferricin

Lactoferricin is an antimicrobial peptide derived from lactoferrin, a protein found in milk and other secretions. It has potent antibacterial, antiviral, and antifungal properties.

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Side-by-Side Comparison

Aspect	Alpha-Defensin	Lactoferricin
Dose Range	100 mcg–500 mcg	100 mcg–500 mcg
Frequency	1x daily	1x daily
Cycle Length	2–4 weeks	2–4 weeks
Route	subcutaneous	subcutaneous
Mechanism	Insert into microbial membranes to form pores, leading to cell death. Also have immunomodulatory effects including chemotaxis of immune cells and cytokine modulation.	Binds to and disrupts microbial membranes through electrostatic interactions. Also binds to lipopolysaccharide (LPS) to neutralize endotoxins and has immunomodulatory effects.
Typical Dosage	Research compound - dosing varies by application. Typically studied in laboratory and early clinical research settings rather than for general use.	Research applications vary widely. Oral lactoferrin supplements (containing lactoferricin precursor) typically dosed at 100-400mg daily.
Administration	Various routes studied including topical, local injection, and systemic administration depending on application.	Available through lactoferrin supplementation orally. Purified lactoferricin primarily used in research settings.
Side Effects	Limited human use data. May cause local inflammation. Potential for immune activation effects.	Lactoferrin supplementation is generally well-tolerated. May cause GI upset in some individuals. Derived from milk so caution with dairy allergies.
Best For	Recovery & Healing Immune Support	Immune Support Gut Health