Home Research library BPC-157 vs TB-500
Comparison
BPC-157 vs TB-500
BPC-157 and TB-500 are separate research compounds. This page sets what our catalogue and the laboratory certificates state about each one side by side: identifiers, formula, molecular weight, chain length, form and storage. It describes the materials, not what they do, and carries no use guidance.
Specification, side by side
| BPC-157 | TB-500 | |
|---|---|---|
| Also known as | Body protection compound 157 | Thymosin beta-4 derived |
| Catalogue shelf | Research peptides | Research peptides |
| CAS number | 137525-51-0 | Not stated by our supplier |
| Molecular formula | C62H98N16O22 | Not stated by our supplier |
| Molecular weight | 1,419.5 g/mol | Not stated by our supplier |
| Chain length | 15 residues | Not stated by our supplier |
| Sequence | GEPPPGKPADDAGLV | Not stated by our supplier |
| Form as supplied | Lyophilized powder | Lyophilized powder |
| Storage | -20 °C, desiccated, protect from light | -20 °C, desiccated |
| Sizes stocked | 5 mg, 10 mg, 15 mg | 10 mg |
| Current certificates | 5 mg: 99.73%, lot BP5-080310 mg: 99.71%, lot BP10-080315 mg: 99.84%, lot BP15-0803 | 10 mg: 99.68%, lot TB10-0803 |
| PubChem record | CID 9941957 | None listed |
Figures are the ones printed on each product page. Purity appears only where a current laboratory certificate supports it, and links to that certificate.
What differs
- Our supplier does not state a CAS number, formula or molecular weight for TB-500, so those fields are left empty here and are not filled in from elsewhere.
What each one is
BPC-157
A fifteen-residue fragment of a protein found in gastric juice. Used in culture and in rodent models to examine angiogenic signalling, fibroblast migration and the VEGFR2 pathway, and as a reference compound in tendon and gut epithelial work. Stable across a wide pH range, which is unusual for a peptide this size and part of why it is so widely studied. See BPC-157.
TB-500
A synthetic peptide derived from thymosin beta-4, the actin-sequestering protein. Used to study cell migration and structural protein interactions in culture. See TB-500.
Common questions
Are BPC-157 and TB-500 the same compound?
No. They are catalogued, sold and certified as separate materials. Where our supplier states identifiers for one of them, they are in the table above.
Is there a certificate of analysis for BPC-157 and TB-500?
BPC-157 has 3 current certificates and TB-500 has 1 current certificate in the testing library, each linked to the laboratory's own file.
Does this page say what BPC-157 and TB-500 are used for?
No. It compares the materials as chemicals: identifiers, formula, weight, chain length, form and storage. Everything here is sold for laboratory research use only, and the site publishes no use guidance.
Further reading
- TB-500 and thymosin beta-4 are not the same moleculeThymosin beta-4 is a 43-residue protein. TB-500 is a seven-residue synthetic fragment of it. Here is the identity of each, the thymosin alpha-1 mix-up, and the status of all three as of September 2026.
- Is BPC-157 legal? FDA status, Category 2 and WADA in 2026BPC-157 is not banned in US law, not FDA approved and not compoundable under 503A. Its Category 2 history, the July 2026 committee vote and WADA S0, each dated to its source, as of October 2026.
Other comparisons
For laboratory research use only. Not a drug, not a supplement, not for human or veterinary use.