Peptide Category

Immune &
Gut Health

Thymic peptides, antimicrobials, gut barrier compounds, and CIRS protocols. Six compounds for immune reconstitution, chronic infection defense, intestinal permeability repair, and inflammatory bowel support — the immune system's operating system, upgraded.

6
Peptide Profiles
2
Named Stacks
10
Blood Markers
Featured Stack: Shield Stack — Thymosin Alpha-1 + LL-37 + BPC-157
All Immune & Gut Peptides
Thymosin Alpha-1
Zadaxin · Immune Commander
The most potent immune modulator in the peptide space. Activates dendritic cells, enhances T-cell differentiation, bridges innate and adaptive immunity. FDA-approved in 30+ countries.
1.6
mg/dose
2x
Weekly
30+
Countries
Shield StackT-CellDC Activation
Thymalin
Khavinson Bioregulator · Thymic Peptide
Dipeptide thymic bioregulator that restores age-related thymic involution. Khavinson's longitudinal studies showed significant mortality reduction in elderly populations receiving thymic peptides.
10
mg/day
5–10
Day Bursts
RU
Approved
BioregulatorThymicKhavinson
LL-37
Cathelicidin · Antimicrobial Peptide
The body's primary antimicrobial defense peptide. Destroys bacteria, viruses, and fungi while penetrating biofilms. Critical for Lyme disease, CIRS, and chronic infection protocols.
50–100
mcg/dose
3–5x
Weekly
Biofilm
Breaker
Shield StackLyme/CIRSAntimicrobial
KPV
Lys-Pro-Val · Anti-Inflammatory Tripeptide
Alpha-MSH fragment that suppresses NF-κB — the master inflammatory switch — without melanocortin side effects. Specifically effective for gut inflammation, IBD, and IBS protocols.
200–500
mcg/day
Oral
+ SubQ
NF-κB
Suppressor
Gut HealingNF-κBIBD
VIP
Vasoactive Intestinal Peptide · CIRS Protocol
28-amino acid neuropeptide critical for Shoemaker CIRS (mold illness) recovery. Regulates pulmonary arterial pressure, modulates immune response, and supports blood-brain barrier integrity.
50
mcg 4x/day
Nasal
Route
CIRS
Protocol
CIRSMold IllnessBBB
Larazotide
AT-1001 · Tight Junction Regulator
8-amino acid peptide that regulates zonulin signaling to restore intestinal barrier function. The most direct intervention for leaky gut. Phase 3 trials for celiac disease.
0.5–1
mg 3x/day
Oral
Luminal
Phase 3
Clinical
Leaky GutZonulinCeliac
Immune Defense Protocol
The Shield Stack
Thymosin Alpha-1 rebuilds T-cell function and adaptive immunity. LL-37 handles direct antimicrobial action and biofilm disruption. BPC-157 provides GI support during immune activation. The complete defense protocol for chronic infections and immune reconstitution.
🛡️ Thymosin Alpha-1 — 1.6mg 2x/week 🧬 LL-37 — 50–100mcg 3–5x/week 💉 BPC-157 — GI support during activation
Gut Barrier Protocol
The Gut Repair Stack
Three-compound approach to intestinal permeability. Larazotide seals tight junctions through zonulin modulation. KPV suppresses NF-κB-driven gut inflammation. Oral BPC-157 promotes mucosal repair. Addresses leaky gut from three independent mechanisms.
🔒 Larazotide — 0.5–1mg 3x/day before meals 🔥 KPV — 200–500mcg/day oral 💊 BPC-157 Oral — 250–500mcg/day
Go Deeper

Get the complete immune defense protocol.

Our free Protocol Guide includes complete Immune & Gut protocols — dosing schedules, stacking recommendations, blood work panels, and tracking templates.

Free 50-page Protocol Guide
38 peptides · 7 protocols · dosing tables · blood work reference
38+
Peptides
7
Protocols
50
Pages
Free Instant Access
Unlock your protocols.
Research-backed peptide guides, dosing calculators, and weekly intel — used by biohackers worldwide.
50-Page Protocol Guide PDF
38 peptides, 7 protocol templates, dosing tables, blood work reference
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Weekly research breakdowns, protocol spotlights, blood work insights
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