Peptides & Research Chemicals
TB-500 (Thymosin Beta-4 fragment)
Street names: TB4, Thymosin Beta-4
Overdose? Act now. Call emergency services — say "unresponsive, not breathing". Give naloxone for opioid-like signs. Hotlines
⚡What it does
- Marketed for soft-tissue healing and flexibility (animal and cell data)
- Anti-inflammatory reputation
⚠Key risks
- No approved human use or trials — same self-experimentation class as BPC-157
- Growth/repair factor activity raises theoretical cancer concerns
- Contamination and mislabeling routine in unregulated supply
- WADA-banned for athletes (detectable)
✚Overdose signs
- Unknown in humans
- Injection-site infection
- Unexplained fatigue, immune reactions
📋Quick facts
Also known asTB4, Thymosin Beta-4
CategoryPeptides & Research Chemicals
Schedule / classUnscheduled — 'research chemical'; banned in sport (WADA)
AppearanceLyophilized powder vials (2–10 mg), reconstituted for injection
Street price~$25–$70 per vial grey-market
Legal status'Research use only'; WADA-prohibited in competition
Last updated2026-09-16
Sources: FDA, WADA, PubMed
Category comparison — Peptides & Research Chemicals
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| TB-500 (Thymosin Beta-4 fragment) | Unscheduled — 'research chemical'; banned in sport | No approved human use or trials — same self-experimentation class as BPC-157; Growth/repair factor activity raises theoretical cancer concerns | ~$25–$70 per vial grey-market |
| BPC-157 | Unscheduled — 'research chemical', not approved for human use anywhere | ZERO human clinical trials — all human use is anecdotal self-experimentation; Unregulated synthesis: purity, sterility, and actual content unverified | ~$20–$60 per 5 mg vial grey-market |
Street prices are regional estimates. Potency and cuts vary constantly.
RxBrand names on the grey market
These brands are sold as this compound. Same molecule, different label and supply chain — quality varies enormously between them.
TB 500
?Frequently asked questions
What does TB-500 (Thymosin Beta-4 fragment) look like?
Lyophilized powder vials (2–10 mg), reconstituted for injection
What are the signs of a TB-500 (Thymosin Beta-4 fragment) overdose?
Unknown in humans; Injection-site infection; Unexplained fatigue, immune reactions Call emergency services immediately.
How addictive is it?
No approved human use or trials — same self-experimentation class as BPC-157 Dependence can develop with regular use.