A recovery research peptide. Live vendor vial prices, sorted lowest first.
For research use only. Not for human consumption. No health, dosing, or usage claims are made.
TB-500 is the market name for a peptide derived from thymosin beta-4, a naturally occurring protein involved in cell and tissue processes. It is sold strictly as a research chemical and is not a medicine. The CAS number on file (77591-33-4) is for the full-length 43-amino-acid protein, while products sold as 'TB-500' are often a shorter active fragment; buyers should confirm exactly which molecule a Certificate of Analysis describes.
The on-file CAS (77591-33-4) is the full-length 43-amino-acid thymosin beta-4. Products sold as 'TB-500' are often the shorter LKKTETQ fragment — confirm which molecule the COA describes.
Regulatory status: TB-500 is not an FDA-approved drug; the FDA lists 'Thymosin beta-4, fragment (LKKTETQ), also known as TB-500' among bulk drug substances that may present significant safety risks (Category 2) for compounding, page content current as of 04/22/2026.
Typical vendor vial prices, Jul 2026. Exact prices load with verified listings.
| Vendor | Vial price | |
|---|---|---|
Simple Peptide | $0.05Best | View vendor › |
Precision Research Peptides | $0.13 | View vendor › |
Prime Lab Peptides | $0.16 | View vendor › |
Koi Peptides | $0.18 | View vendor › |
Protide Health | $0.20 | View vendor › |
BioInfinity Lab | $0.22 | View vendor › |
Kaia Peptides | $0.33 | View vendor › |
BioLongevity Labs | $0.50 | View vendor › |
Mile High Compounds | $1 | View vendor › |
PSPeptides | $3.60 | View vendor › |
Skye Peptides | $8.80 | View vendor › |
These are areas explored in the scientific literature, largely in cell and animal studies; they are not health claims and do not indicate any effect in people.
3 verified studies on file for TB-500. Every citation read back from PubMed, with the experimental model stated on each one — and the clinical count shown plainly. Research library →Planning a reconstitution? Use the calculator — it is math for handling a vial, not dosing.
Sources & further reading: PubChem CID 45382195 — Thymosin Beta 4 identity (NCBI) · FDA — Certain Bulk Drug Substances That May Present Significant Safety Risks (503A Category 2) · Thymosin beta-4 and the vasculature (PubMed)
How we source this ›