Immune Peptides: Which One Do You Need? (2026)

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Immune & Thymic Peptides (8)

Thymosin Alpha-1

An immune-boosting peptide used in 30+ countries for viral defense.

LL-37

An antimicrobial peptide for immune defense and wound healing.

KPV

An anti-inflammatory peptide for gut health and skin conditions.

Thymulin

A thymic peptide for immune regulation and hair regrowth support.

Thymalin

A thymus-derived peptide bioregulator studied in Russian clinical literature for immune balance and age-related immune decline; distinct from thymulin and thymosin alpha-1, and not FDA-approved.

VIP

An immune-rebalancing peptide for CIRS, mold illness, and neuroinflammation.

Thymogen

A Khavinson thymus dipeptide (Glu-Trp / EW) isolated from Thymalin; Russian research reports immune-modulating effects, single-lab preclinical/clinical only.

Vilon

A Khavinson Lys-Glu (KE) dipeptide bioregulator studied in rodent and cell models for immune and geroprotective effects; no independent human trials.

side-effects

Vilon Side Effects: What the Evidence Shows

Vilon's originators claim near-zero side effects, but independent safety data barely exists. What the research shows — and the risks it leaves out.

Thymogen Side Effects: What the Evidence Shows

Its makers call it nearly side-effect-free after decades of Russian use. Independent Western data barely exists — here's what that gap hides.

Thymalin Side Effects: What the Data Shows

Russian clinical reports call thymalin nearly side-effect-free — but independent Western safety data is essentially absent. What the gap means.

VIP Side Effects: 7 to Watch For

Transient hypotension hits most VIP users — but lipase elevation is the one to actually monitor. Full safety breakdown by frequency.

KPV Side Effects: Anti-Inflammatory Peptide Safety

Animal colitis models report clean safety. Community data adds mild injection-site reactions. Full safety breakdown.

KLOW Blend Side Effects: Component Research Review

Injection-site reactions lead. Flushing from GHK-Cu and brief lethargy from KPV cluster in community reports. Full safety breakdown.

results

Vilon Results: Week-by-Week Timeline

Vilon has no human efficacy trials — so where do its timelines come from? Rodent and human-cell-culture mechanism data plus labeled community reports.

Thymogen Results: Week-by-Week Timeline

Thymogen has no modern human efficacy trial — so what shapes its reported timeline? Old Russian course data and labeled community reports, week by week.

Thymalin Results: Course-by-Course Timeline

Thymalin has no modern efficacy trial. Here's what the documented clinical course structure and labeled community reports describe, stage by stage.

Thymulin Results Timeline: What to Expect

Thymulin is an immune biomarker peptide, not a fast one. What research documents from week 1 to month 6 — and why most effects stay subclinical.

LL-37 Results Timeline: Week-by-Week

Acute users describe shifts in 1-2 weeks; CIRS protocols run months. Full LL-37 timeline by use case, with biomarker watch and variability factors.

VIP Peptide Results: Week-by-Week Timeline

Most CIRS responders report cognitive shifts by week 4, but grey matter changes need months. Full VIP timeline by route and use case.

reconstitution

Vilon Reconstitution: 20mg Vial Mixing Chart

Vilon has no validated human concentration. See how community resources describe mixing the 20mg vial, plus syringe-unit math and storage limits.

Thymogen Reconstitution: 20mg Vial Mixing Chart

Thymogen has no validated human concentration. See how community resources describe mixing the 20mg vial, plus syringe-unit math and storage limits.

Thymalin Reconstitution: 10mg Vial Mixing Chart

A 10mg Thymalin vial plus 1mL bacteriostatic water gives 10mg/mL. Published use was saline IM; community sources describe SC. Dilution charts and storage.

VIP Reconstitution: 5mg + 5mL Chart

50mcg = 5 units at 1mg/mL. The mix differs for SubQ vs intranasal — dilution charts, syringe math, and nasal-spray prep, step by step.

dosing

Vilon Dosing: KE Dipeptide Course Protocol

Vilon is a synthetic Lys-Glu dipeptide with no validated human dose. What the Russian rodent data showed and how community course protocols run.

Thymogen Dosage: What the Research Shows

No modern trial set a Thymogen dose. Russian practice used ~100mcg short courses — here's the reconstitution math and why a 20mg research vial doesn't fit.

Thymalin Dosing: 5-10mg IM Course Protocol

Thymalin is a thymus extract fraction, not thymulin or thymosin alpha-1. What Russian clinical literature documented vs community SC use.

Thymosin Alpha-1 Dosing: 1.5mg 5on/2off Protocol

The 5on/2off schedule prevents desensitization most miss. Covers 1.5mg daily protocol, LL-37 stacking, and 8-week cycling.

KPV Dosing: 500mcg AM, 5-On/2-Off Protocol

One of the few peptides that works orally — but route changes the target. Covers gut vs systemic protocols, NF-kB inhibition, and cycling.

buying-guide

Where to Buy Vilon: Price & Vendor Guide

Vilon is a synthetic Lys-Glu dipeptide, not the Thymalin thymus extract. How to read a 275 Da COA, spot the mix-up, and what it really costs.

Where to Buy Thymogen: Price & Vendor Guide

A synthetic Glu-Trp dipeptide sold as a research chemical — not the thymus extract that holds the clinical data. How to verify a Thymogen COA and vendor.

Where to Buy Thymalin: Price & Vendor Guide

Thymalin is a thymus extract fraction, not a defined peptide, so batch purity varies wildly. How to read a COA and avoid buying the wrong compound.

benefits

Vilon for Immune Aging: The Evidence

Vilon's immune and geroprotection claims rest on one Russian lab's rodent and cell data. Here's what the studies actually reported, and what they didn't.

Thymogen for Immune Support: The Evidence

Thymogen is the synthetic dipeptide pulled from Thymalin — its immune and anti-tumor claims trace to one Russian lab. Here's what the data shows.

Thymalin for Immune Support: The Evidence

Thymalin's immune claims rest on decades-old Russian data from a single research group — here's what the studies actually reported, and what they didn't.

LL-37 Benefits: Biofilm Breaker + 9 Immune Effects

Most antimicrobial peptides can't touch biofilms — LL-37 can. 9 immune and healing effects ranked by research strength.

VIP Peptide: CIRS + Mold Illness Treatment

CIRS and mold illness treatment is VIP's strongest clinical use — but it does far more. 6 research-backed effects with cited studies.

Thymulin Benefits: 7 Immune Effects

Without zinc, thymulin does nothing — most miss this critical detail. 7 research-backed immune and anti-inflammatory effects.

guides

Where to Buy VIP: Price & Vendor Guide

5mg vials run $80-180 — 28-residue peptide, expensive. Phase 2 sarcoidosis trial used inhaled aviptadil. Which COAs verify 3,326 Da.

Where to Buy Thymosin Alpha-1: Vendor Guide

5mg vials run $40-90 and 10mg run $70-160 — clinical trials used 1.6mg twice weekly. Which COAs verify the 28-residue peptide, red flags.

Where to Buy LL-37: Price & Vendor Guide

5mg vials run $50-110 — venous-leg-ulcer trial dosed at 0.5-1.6mg/mL topically. Which COAs verify the 37-residue cathelicidin, red flags.

Where to Buy GHK-Cu/KPV Blend: Vendor Guide

60mg blend vials run $80-160 — skin regeneration plus anti-inflammatory in one shot. Which COAs verify both peptides, red flags.

VIP Dosing: 50mcg SubQ AM/PM Protocol

VIP is the final step in the Shoemaker protocol — using it too early backfires. Covers 50mcg SubQ, intranasal CIRS dosing, and cycling.

Thymulin Dosing: 2mg/Day for 20 Days

Thymulin is inactive without zinc — most protocols miss this. Covers 2mg SubQ PM dosing, zinc co-dosing, and 20-day cycling 3x/year.

bloodwork

Thymosin Alpha-1 Bloodwork: 6 Labs to Track

Most skip the CD4/CD8 ratio — the one marker that proves thymosin alpha-1 is working. 6 essential labs with optimal ranges and testing schedule.

articles

Best Peptides for Skin & Hair (2026 Beginner's Guide)

Ranking of peptides community sources describe for skin and hair — what each does, who it suits, what users self-report.

Best Peptides for Inflammation (2026 Beginner's Guide)

Ranking of the anti-inflammatory peptides — what each one does, who tends to use it, and what users actually report.

Best Peptides for Immune Support (2026 Beginner's Guide)

Ranking of the immune peptides — what each one does for innate, adaptive, or regulatory immunity, and what users actually report.

Best Peptides for Gut Health (2026 Beginner's Guide)

Ranking of the gut peptides — what BPC-157, KPV, and LL-37 do for the gut wall, who tends to use each, and what users actually report.

Price Comparisons

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This page is for educational and research purposes only. It does not constitute medical advice. Always consult a qualified healthcare professional before starting any peptide protocol.