Lactoferrin-derived Peptides (LfcinB)
Also known as: Lactoferricin B, LfcinB, Lactoferrin-derived antimicrobial peptide
Antimicrobial peptides derived from lactoferrin that modulate innate immunity and have direct bactericidal activity.
Beginner Basics
Plain-English guide to Lactoferrin-derived Peptides (LfcinB)
What it does
This peptide helps your body's natural defense system fight off bacteria and manage inflammation by activating immune cells and directly killing harmful microbes. Researchers study it to support wound healing and strengthen the body's ability to fight infections.
Typical dose
Researchers commonly use 50-200 micrograms once or twice daily, delivered as a subcutaneous injection (under the skin). Some studies use intranasal or oral routes instead.
When to inject
Morning and evening injections are typical, though the best timing depends on the specific research protocol being followed.
Storage
Keep the dry powder in a cool, dark place away from moisture until you mix it. Once mixed with liquid, store in the refrigerator and use within the timeframe specified by your supplier.
First-timer tip
Start at the lower end of the dose range (50 micrograms) and gradually increase only if needed, since this peptide activates your immune system and you want to see how your body responds first.
On This Page
Research Status
Clinical trials
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
Localized redness, swelling, or tenderness at the injection site typically resolves within 24-48 hours. Minimize by allowing the solution to reach room temperature before injection, rotating sites systematically, and using proper injection technique. Apply ice for 10 minutes if discomfort persists.
Low-grade fever (37.5-38.5°C) or mild chills may occur 2-6 hours after injection due to immune activation and cytokine release. Typically self-resolving within 12-24 hours. Monitor temperature; contact healthcare provider if fever exceeds 38.5°C or persists beyond 24 hours.
May occur if the peptide reaches the GI tract or triggers systemic immune activation. Usually resolves within 24-48 hours. Ensure adequate hydration and take with food if tolerated. Discontinue if symptoms persist or worsen.
Mild to moderate headache may occur in the first 24 hours post-injection, likely related to immune activation and cytokine release. Manage with over-the-counter analgesics (acetaminophen or ibuprofen) and adequate hydration.
Repeated injections at the same site can cause localized fat loss (lipoatrophy) or fat thickening (lipohypertrophy). Prevent by rotating injection sites systematically with each dose, maintaining at least 1 inch between previous injection points, and keeping detailed injection logs.
Hypersensitivity to the peptide or excipients may manifest as localized or generalized rash, hives, or facial/throat swelling. Discontinue immediately and seek medical evaluation. Have antihistamines available. Anaphylaxis is extremely rare but requires emergency medical attention.
Excessive immune activation may cause elevated CRP, ESR, or white blood cell count. Monitor inflammatory markers during clinical trials. Reduce dose or increase interval between injections if markers become significantly elevated. Consult healthcare provider before continuing.
Bacterial or fungal infection may occur if sterile technique is not maintained. Signs include increasing redness, warmth, swelling, pus, or systemic fever. Seek immediate medical evaluation. Ensure all equipment is sterile and injection sites are cleaned thoroughly before each injection.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 50-200 mcg |
Frequency, timing and route - members only | |
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline, use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2-8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
| Molecular weight | 3102 Da |
| Half-life | Approximately 30-60 minutes in serum (varies by route and formulation); longer retention at mucosal surfaces |
| Sequence | Members only |
Lactoferricin B (LfcinB) is a cationic antimicrobial peptide derived from the N-terminal region of lactoferrin that exerts dual mechanisms: direct bactericidal activity through disruption of bacterial cell membranes and iron sequestration, and immunomodulatory effects through activation of innate immune cells including neutrophils, macrophages, and dendritic cells. The peptide enhances antimicrobial peptide production, promotes inflammatory cytokine release, and supports mucosal barrier function, making it effective against both gram-positive and gram-negative pathogens.
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View all peptidesResearch Use Only. All content on this page is provided for informational and educational purposes related to scientific research. Lactoferrin-derived Peptides (LfcinB) is not approved for human use by the FDA or any equivalent regulatory body. This is not medical advice. Do not use any substance discussed here for therapeutic, diagnostic, or preventative purposes. Consult a qualified healthcare professional before making any health-related decisions. The Peptide Volt does not endorse the use of any research chemicals. 18+ only.