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
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 |
| Melanotan II | Unscheduled | Unapproved — regulators (FDA/TGA/MHRA) have issued warnings and seizures; 'Melanotan rage' — documented mood/aggression changes | ~$20–$50 per 10 mg vial grey-market |
| GHRPs & GH Secretagogues | Unscheduled — 'research chemicals' | All are 'research chemical' grade unless pharmacy-sourced: purity unknown; Water retention, carpal-tunnel symptoms, insulin resistance with chronic use | ~$15–$40 per vial grey-market |
| IGF-1 & MGF analogues | Unscheduled — 'research chemicals'; IGF-1 is Rx | Hypoglycemia — IGF-1 pulls blood sugar down hard; dangerous in diabetics; Theoretical but serious cancer concerns — IGF-1 feeds tumor growth | ~$30–$80 per vial grey-market |
| PT-141 (Bremelanotide) | Rx-only | Nausea is near-universal on dosing (the #1 side); Blood-pressure spikes then drops — the BP warning is real | ~$20–$60 per 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.