Snowman Research
US orders ship free, any size.Free 3 mL BAC water on every order! (Optional)

Free US shipping on every order · Worldwide for $40 · Usually ships within 24 hours, with tracking provided · Free 3 mL BAC water on every order! (Optional)

BPC-157 vs TB-500 side by side: reading the vial, not the hype

Our structure and naming guide covers where these two peptides come from. This one stays at the bench: the numbers you can actually check on a vial of BPC-157 (Body Protection Compound 157) or TB-500 (thymosin beta-4 fragment), how a two-in-one blend vial is counted, and what to look for on the paperwork. It is a labeling and arithmetic reference only, with no dosing, no usage guidance and no effect claims. Both compounds are sold strictly for laboratory research by adults 21+.

Snowman Research does not offer dosing information or usage guidance of any kind. Everything on this page is reference material about research products sold for laboratory research only.

Bench-side comparison
BPC-157TB-500
Full nameBody Protection Compound 157, a synthetic pentadecapeptideA synthetic peptide modeled on a short region of thymosin beta-4 (Tβ4)
Chain length15 amino acids[1]7 amino acids (LKKTETQ), per the FDA's listing[2]; the parent Tβ4 protein is 43[3]
Molecular weightAbout 1,419.5 g/mol (C62H98N16O22)[1]Varies with the exact sequence a seller uses, so read it off the supplier's paperwork
Is the name tied to one sequence?Yes: one fixed sequenceNot always: sellers sometimes mean slightly different fragments
Our vialBPC-157 5mg, freeze-driedTB-500 5mg, freeze-dried
Approved for human use?NoNo

Why molecular weight is worth a glance

(Looking for origins and naming? See the BPC-157 vs TB-500 structure guide.)

A name on a label is a promise; a molecular weight is something a lab can measure. BPC-157 has a single accepted sequence, and PubChem lists it at about 1,419.5 g/mol[1]. If a certificate of analysis for a BPC-157 vial reports a mass far from that figure, the vial deserves a closer look.

TB-500 is slipperier. The FDA lists it as the seven-residue fragment LKKTETQ[2], but the name gets used loosely, so the paperwork, not the name, is what tells you which chain is in the vial.

Counting a blend vial

Some vials carry both compounds, like our BPC-157 + TB-500 (Wolverine) blend. A blend is just two separate peptides sharing one vial. The label should give each amount on its own, and the headline milligram figure is those two numbers added together. The GLOW vs KLOW vs Wolverine guide breaks that blend down further.

Separate vials keep each compound on its own line in your notes; a blend saves a step but locks in the ratio. Neither choice is better in general, it just depends on what the experiment needs to track.

A quick label checklist

  • The exact compound name, not just a nickname.
  • Milligrams per vial, and for blends, milligrams of each component.
  • A lot or batch number you can match to paperwork.
  • For TB-500, the sequence or molecular weight on any test report.

To turn milligrams and water volume into a concentration, our Lab Calculator does the division. It is arithmetic only.

Where the research stands

Published BPC-157 work is overwhelmingly preclinical: a 2025 systematic review found only one human study among 36 that qualified[4]. For the TB-500 fragment, the FDA reports no human exposure data[2]. Neither compound is approved for any human or animal use, and nothing on this page is dosing, medical or usage advice.

On our shelf

Sources

  1. BPC 157 (CID 9941957): molecular formula C62H98N16O22, molecular weight 1419.5 g/mol. PubChem, U.S. National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/compound/9941957
  2. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks. U.S. Food and Drug Administration. https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks
  3. Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications. Expert Opin Biol Ther. 2012;12(1):37-51. PMID 22074294. https://pubmed.ncbi.nlm.nih.gov/22074294/
  4. Emerging Use of BPC-157 in Orthopaedic Sports Medicine: A Systematic Review. HSS J. 2025;21(4):485-495. PMID 40756949. https://pubmed.ncbi.nlm.nih.gov/40756949/

For laboratory research use only. Not for human or veterinary use, not FDA-approved, and nothing on this page is medical advice. You must be 21 or older to purchase.

Discussion

No comments yet. Start the discussion.

Join the discussion

Research discussion only. No dosing or medical advice. Be kind. Nothing posts live until we approve it.