Peptide Profile

TB-500 // Systemic Healer

Also known as: Also known as: Thymosin Beta-4 Fragment · Tβ4 · TB4

The systemic healer. TB-500 promotes bodywide recovery through actin regulation, cell migration, and anti-inflammatory signaling. While BPC-157 excels at local tissue repair, TB-500's mechanism enables healing cells to migrate to injury sites throughout the body. The other half of the legendary Wolverine Stack.

Healing & Recovery Subcutaneous Injection Research Compound
Systemic
Full-Body
Actin
Regulation
Cell
Migration
Clinical Development Pipeline
Preclinical
Phase 1
Phase 2
Phase 3
FDA Review
Approved
Quick Reference
Key protocol parameters
Category
Systemic HealingThymosin derivative
Route
SubcutaneousSystemic dosing
Frequency
2–3x weekly
Half-Life
~HoursEffects persist days
Dose Range
2.5–5mg/dose
Cycle
4–12 weeksLoading + maintenance
Mol. Weight
4963 Da43-amino acid
Purity
≥98% HPLCResearch grade
Reconstitution
5mg + 1mL BAC= 5mg/mL

Healing cells that know where to go.

TB-500 doesn't just promote healing — it enables the migration of healing cells to where they're needed. By regulating actin polymerization, TB-500 gives stem cells, immune cells, and fibroblasts the cytoskeletal machinery to physically move to injury sites throughout the body.

Actin Regulation
Sequesters G-actin monomers, promoting actin polymerization needed for cell migration, blood vessel formation, and wound closure. The actin cytoskeleton is the physical machinery cells use to move.
Cell Migration
Upregulates proteins involved in cell migration — enabling stem cells, endothelial progenitors, and inflammatory cells to travel to distant injury sites. This is why TB-500 works systemically rather than just locally.
Anti-Inflammatory
Reduces inflammatory cytokines and promotes the shift from inflammatory to regenerative healing phases. Counteracts excessive inflammation that slows tissue repair.

Loading phase, then maintenance.

TB-500 uses a loading protocol to saturate tissues, followed by a lower maintenance dose. The compound has systemic distribution — inject SubQ in the abdomen, not necessarily near the injury site.

Weeks 1–4 · Loading
5mg 2x/week
10mg total per week. Systemic SubQ injection.
Weeks 5–8 · Maintenance
2.5–5mg 1x/week
Reduce frequency once loading is complete.
Weeks 9–12 · Extended
2.5mg 1x/week
Continue for chronic injuries or high training volume.
Post-Cycle · Assessment
Discontinue
Assess healing. Resume loading if new injury occurs.
⚠ Important: TB-500 is a research compound and not FDA-approved. It is banned by WADA for athletic competition. This is educational content — not medical advice.

Thymosin Beta-4 — from thymus to tissue repair.

TB-500 is a synthetic version of the active region of Thymosin Beta-4 (Tβ4), a naturally occurring protein found in virtually all human cells. Tβ4 was originally discovered in the thymus gland but is now known to be ubiquitous.

Research on Thymosin Beta-4 has demonstrated healing effects across cardiac tissue (post-heart attack), corneal wounds, skin injuries, tendons, and muscle. The mechanism — actin regulation enabling cell migration — explains the broad tissue applicability.

The combination of TB-500 with BPC-157 (the Wolverine Stack) leverages complementary mechanisms: BPC-157 upregulates local growth factors while TB-500 enables systemic healing cell migration. This combination is the most widely used healing protocol in the peptide community.

Systemic healing comparison.

CompoundMechanismScopeRouteBest For
TB-500Actin + Cell MigrationSystemicSubQBodywide recovery
BPC-157Growth Factors + NOLocal + SystemicSubQ / OralTargeted injuries
GHK-Cu4000+ Gene ActivationSkin + CollagenSubQ / TopicalAnti-aging + repair
PRPPlatelet FactorsLocalInjectionJoint/tendon

What to watch for.

TB-500's side effect profile is manageable with proper protocol adherence. Baseline blood work before starting and periodic monitoring during use is essential.

Side Effects
  • Well tolerated across reported use
  • Injection site reactions
  • Head rush / lightheadedness (transient)
  • Temporary lethargy during loading (resolves)
  • Possible hair growth effects (Tβ4 role in hair follicles)
  • Banned by WADA — not for competitive athletes
Blood Work Panel
  • CRP (inflammation — should improve)
  • CBC (baseline)
  • Comprehensive metabolic panel
  • Imaging for specific injuries
Stacking Notes
  • BPC-157 for the Wolverine Stack — the gold standard
  • GHK-Cu for collagen and gene activation alongside tissue repair
  • CJC-1295/Ipamorelin for GH-enhanced recovery
  • DSIP for sleep-based recovery amplification
  • Banned by WADA — do not use if subject to testing
  • Systemic dosing — no need to inject near injury site
Storage & Handling
  • Lyophilized: refrigerate at 2–8°C
  • Reconstituted: refrigerate, use within 14–21 days
  • Protect from light
  • Do not freeze
  • Larger molecule — handle carefully during reconstitution
Agent Verdict

The systemic healer that goes where the damage is.

TB-500's unique mechanism — enabling healing cell migration through actin regulation — means it doesn't just work at the injection site. It works everywhere. The Wolverine Stack pairing with BPC-157 is the peptide community's most trusted healing protocol for a reason: BPC handles local growth factor upregulation while TB-500 handles systemic cell migration and anti-inflammatory action. Loading phase is important — 2x weekly for the first 4 weeks to saturate tissues, then drop to maintenance. Not for competitive athletes (WADA banned). Get imaging before and after for injuries to track progress objectively.

Go Deeper
TB-500 protocol.

Our free Protocol Guide includes the complete Wolverine Stack — TB-500 + BPC-157 loading protocol, dosing, and recovery tracking templates.

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