# BPC/TB-500

> Research use only. Not for human or veterinary use. Supplied by Veracue Labs.

- Page: https://veracuelabs.com/product/bpc-tb-500
- Category: Healing & Recovery
- Sizes and prices in USD: 5 mg / 5 mg at $76.99; 10 mg / 10 mg at $104.49
- Certificate of analysis: none posted on the page. Request one for a specific lot at https://veracuelabs.com/contact-us.
- Prices are a snapshot from 2026-10-16. The product page shows the current price.

## Overview

BPC/TB-500 is a two-peptide research material that places BPC-157 and TB-500 in one vial. BPC-157 is the 15-residue chain GEPPPGKPADDAGLV (C62H98N16O22, average mass about 1419.56 g/mol, CAS 137525-51-0). TB-500 is the N-acetylated 7-residue thymosin beta-4 fragment Ac-LKKTETQ (C38H68N10O14, about 889 g/mol, CAS 885340-08-9). The peptides are not chemically joined, so each keeps its own identifiers and the vial as a whole has no single formula or CAS number.

## Product Details

### What Is BPC/TB-500?

BPC/TB-500 is a research material made of two separate synthetic peptides, BPC-157 and TB-500, supplied together in a single vial. The name on the label is shorthand: BPC stands for BPC-157, with its number dropped, while TB-500 keeps its full designation. Each peptide has its own sequence, formula, mass and CAS number, and the identifiers below describe the two molecules one at a time.

The peptides are combined, not bonded. There is no linker, fusion or conjugate, so the vial holds BPC-157 chains and TB-500 chains side by side and no third molecule. It is supplied for research use only.

### BPC/TB-500 at a Glance

Product name: BPC/TB-500 (BPC-157 and TB-500)
Composition: Two separate synthetic peptides in one vial
BPC-157 sequence: Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val (GEPPPGKPADDAGLV), 15 residues
BPC-157 identity: C62H98N16O22, average mass about 1419.56 g/mol, CAS 137525-51-0, PubChem CID 9941957
TB-500 sequence: Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln-OH (Ac-LKKTETQ), 7 residues, acetylated at the N-terminus
TB-500 identity: C38H68N10O14, average mass about 889 g/mol, CAS 885340-08-9, PubChem CID 62707662
Sizes offered: 5/5 mg and 10/10 mg vials
Research designation: Research Use Only

Formula, mass and database numbers are reference values for the free peptides and are not a Veracue lot result. Chemical form, purity, lot number and the measured content of each peptide in a particular vial belong to that lot’s own documentation. For a particular vial, documentation can be requested through the contact page.

### How to Read 5/5 mg and 10/10 mg

The strength is written as two figures that follow the order of the name. The first belongs to BPC-157 and the second to TB-500, so 5/5 mg labels 5 mg of each peptide and 10/10 mg labels 10 mg of each.

Equal milligrams are not equal numbers of molecules, because TB-500 is the lighter peptide. The figures below are plain arithmetic from the average masses above, ignore any counterion or water, and are therefore a reference point rather than a lot result.

Labeled strength: BPC-157 amount of substance: TB-500 amount of substance

5/5 mg: About 3.52 µmol: About 5.62 µmol
10/10 mg: About 7.04 µmol: About 11.25 µmol

### What BPC/TB-500 Is Not

- Not a single peptide. The vial holds two molecules that differ in length, sequence and mass.
- Not a fusion protein, conjugate or new compound formed from the two peptides.
- Not full-length thymosin beta-4, a 43-residue protein of about 4,963 g/mol.
- Not sold as a dietary, consumer or cosmetic product.
- Not for human or veterinary use.

## Research Focus & Mechanism Overview

### Side-by-Side Identity Data

The two peptides share a vial but little else. The table lists reference data for each molecule, taken from the free peptide.

Attribute: BPC-157: TB-500

Length: 15 residues: 7 residues
One-letter sequence: GEPPPGKPADDAGLV: Ac-LKKTETQ
N-terminus: Free amine on glycine: Acetylated leucine
C-terminus: Free acid on valine: Free acid on glutamine
Molecular formula: C62H98N16O22: C38H68N10O14
Average mass: About 1419.56 g/mol: About 889 g/mol
Monoisotopic mass (calculated): About 1418.70 Da: About 888.49 Da
CAS Registry Number: 137525-51-0: 885340-08-9
PubChem CID: 9941957: 62707662
Parent molecule: Derived from a longer protein reported in human gastric juice: Residues 17 to 23 of the 43-residue thymosin beta-4
Net charge at neutral pH (estimated): About -2: About 0

The charge estimates count the terminal groups and side chains only. BPC-157 carries one lysine against three acidic residues, while TB-500 balances two lysines against one glutamate and its free C-terminal acid.

### Why a Two-Peptide Vial Has No Single Formula or CAS Number

A formula, an average mass and a CAS Registry Number each describe one molecular species. Adding the two formulas together does not give a compound, because the chains stay separate. A listing that quotes one formula, one molecular weight or one CAS number for BPC/TB-500 is therefore describing only one of the peptides, and it should be checked against the table above.

### What the Label Name Leaves Open

### Which peptide does BPC refer to?

In this listing BPC means BPC-157. The same peptide appears as BPC 157, BPC157 and Body Protection Compound-157 in different sources, and the sequence GEPPPGKPADDAGLV is the stable identifier behind all of those spellings.

### Which material does TB-500 refer to?

TB-500 is a market name rather than a formal chemical designation, and suppliers have attached it to different materials. Here it means the acetylated heptapeptide Ac-LKKTETQ. The same seven residues without the acetyl group are a separate compound of about 847 g/mol, roughly 42 Da lighter, so a record should say which one it describes.

### How does TB-500 relate to thymosin beta-4?

No. Thymosin beta-4 is a 43-residue protein of roughly 4,963 g/mol, and TB-500 has only about a fifth of that mass. The stretch LKKTET is usually described as the actin-binding region of the parent protein, but sharing a motif shows where a fragment comes from, not that it behaves like the whole.

### Composition Notes for Both Chains

BPC-157 contains three glycines, four prolines, two alanines, two aspartic acids and one each of glutamic acid, lysine, leucine and valine, with three of the prolines in a row at positions 3 to 5. TB-500 is built from one leucine, two lysines, two threonines, one glutamic acid and one glutamine.

Neither chain has cysteine, methionine or tryptophan, so there are no disulfide bonds and none of the residues that analysts usually watch for oxidation. Neither has any aromatic residue, which changes how the peptides are detected and is covered under Quality & Purity Standards.

### Reading Papers That Name Either Peptide

Published reports normally describe one material in one experimental system. When a paper names BPC-157, TB-500 or both, record the sequence or residue count, whether the TB-500 is acetylated, and the species or cell type, then compare those details with the table above before setting results next to each other. Findings for one peptide do not carry over to the other, and neither carries over automatically to the pair. Veracue offers molecular reference information here and provides no dosing, administration or usage guidance of any kind.

## Quality & Purity Standards

### Verifying Two Peptides in One Vial

One vial needs two identity checks. A lot record that confirms BPC-157 and says nothing about TB-500, or the reverse, leaves half of the material unverified. When documentation is reviewed, look for each item below to be reported for both peptides separately.

Item: What to look for

Lot number: Matches the vial label and the order record
Peptide names and sequences: Both BPC-157 and TB-500 named, each tied to its own sequence
Chemical form: Free peptide or a named salt, stated for each peptide, because a counterion changes the expected mass
Identity result: Observed and expected mass for each peptide, with the method and the mass convention used
Purity method: Chromatographic conditions, with results reported per peptide or per resolved peak
Peptide amounts: The labeled 5/5 or 10/10 mg figures and how they were established
Test date and laboratory: When the work was done and by whom

No purity figure or mass result is stated in this listing, because those belong to one lot, and documentation can be requested through the contact page.

### Reference Masses and Expected Ions

Mass spectra from ESI instruments usually show peptides as charged ions rather than at the neutral mass. The table gives calculated m/z values for each reference formula so an observed spectrum can be checked quickly.

Peptide: Average mass (g/mol): Monoisotopic mass (Da): Ions on an average-mass basis (m/z)

BPC-157: 1419.56: 1418.70: 1+ near 1420.6, 2+ near 710.8, 3+ near 474.2
TB-500: About 889.0: 888.49: 1+ near 890.0, 2+ near 445.5

The peptides sit about 530 Da apart, so their signals cannot be mistaken for each other. A spectrum of a genuine two-peptide vial shows both sets of ions, and a spectrum with only one set means the other peptide was not detected. Sodium and potassium adducts shift observed peaks, and monoisotopic readings sit below average-mass ones, so compare like with like.

### Why Neither Peptide Registers at 280 nm

Tryptophan and tyrosine are what make most peptides absorb near 280 nm, and phenylalanine adds a weak signal nearby. BPC-157 and TB-500 contain none of the three. Chromatographic detection for both therefore relies on the peptide bond, which absorbs in the low UV around 210 to 220 nm, and an absorbance reading at 280 nm will sit close to blank for either peptide.

### Methods and What Each Can Show

Method: Useful for: Cannot show by itself

RP-HPLC at low UV: How many peaks there are and whether both peptides are resolved: Which molecule each peak is
ESI-MS or MALDI-TOF: Observed mass for each peptide against its expected value: Purity or amino acid order
Tandem MS: Fragment evidence for each sequence, including the N-terminal acetyl group on TB-500: Overall purity or quantity
Amino acid analysis: Residue composition and net peptide content: Identity of impurities

### Common Questions About Verification

### Does one purity number describe both peptides?

Only if the document says how it was calculated. A chromatogram of a two-peptide vial should show at least two main peaks, so a lone percentage could refer to one peak, to both together or to the share of one peptide. Ask which.

### How is acetylated TB-500 told apart from the plain sequence?

By mass. The acetyl group adds about 42 Da, giving about 889 g/mol against about 847 g/mol for the same seven residues without it, and tandem MS can place the group at the N-terminus.

### Questions About a Specific Lot

Ask the Veracue team which documentation exists for the lot you are considering.

- Contact the Veracue team
- Return to the research catalog

## Compliance Notice

### Research Use Only Designation

BPC/TB-500 is supplied for laboratory research and analytical characterization only. It is not intended for human or veterinary use, or for ingestion, injection or any other form of administration, and it is not a drug, dietary supplement, cosmetic or food. The designation applies to both peptides in the vial. Veracue offers no dosing, administration or usage guidance of any kind. Buyers must be qualified researchers or institutions and are responsible for handling the material lawfully. The Medical Disclaimer and the Terms and Conditions set out the sitewide policies.

## Questions and answers

### What is BPC/TB-500?

It is a two-peptide research material with BPC-157 and TB-500 in one vial. They are separate molecules, each with its own sequence and CAS number, and Veracue supplies the vial for laboratory research only.

### What do 5/5 mg and 10/10 mg mean on the label?

The figures follow the order of the name, BPC-157 first and TB-500 second, so 5/5 mg labels 5 mg of each peptide and 10/10 mg labels 10 mg of each.

### Is BPC/TB-500 a single compound?

No. The vial holds two unconnected peptides, so there is no single molecular formula, molecular weight or CAS number for it. Each peptide has its own set of identifiers.

### What does BPC stand for on the label?

BPC is the short form of BPC-157, also written BPC 157, BPC157 and Body Protection Compound-157. Here it always means the 15-residue peptide GEPPPGKPADDAGLV.

### What are the sequence and CAS number of the BPC-157 in this vial?

The sequence is GEPPPGKPADDAGLV, or Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val in three-letter code. Reference values are C62H98N16O22, about 1419.56 g/mol, CAS 137525-51-0 and PubChem CID 9941957.

### What are the sequence and CAS number of the TB-500 in this vial?

The sequence is Ac-LKKTETQ, or Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln-OH, seven residues with an acetylated N-terminus. Reference values are C38H68N10O14, about 889 g/mol, CAS 885340-08-9 and PubChem CID 62707662.

### Is the TB-500 here the same as thymosin beta-4?

No. Thymosin beta-4 is a 43-residue protein of roughly 4,963 g/mol, while TB-500 is the Ac-LKKTETQ fragment matching its residues 17 to 23. The name TB-500 is a market name, so the sequence is the safer test of identity.

### Why does the acetyl group on TB-500 matter?

It adds about 42 Da, so the acetylated peptide is about 889 g/mol and the same seven residues without it are about 847 g/mol. They are different compounds, and a record should state which one it describes.

### Does 5 mg of each peptide mean equal numbers of molecules?

No. TB-500 is the lighter peptide, so on a free-peptide basis equal milligrams hold about 1.6 TB-500 molecules for every BPC-157 molecule.

### How far apart do the two peptides appear in a mass spectrum?

Their average masses differ by about 530 Da, roughly 1419.56 against 889 g/mol, so the signals do not overlap. A spectrum of the vial should show ions for both peptides.

### Do BPC-157 and TB-500 absorb light at 280 nm?

Neither contains tryptophan, tyrosine or phenylalanine, so neither has meaningful absorbance near 280 nm. Chromatographic detection relies on the peptide bond at lower wavelengths.

### Does one purity figure describe both peptides in the vial?

Only if the documentation says how it was calculated. Two peptides give at least two chromatographic peaks, so a lone percentage could refer to either one or to both together.

### What should documentation for a two-peptide vial cover?

The lot number, both peptide names with their sequences, the chemical form of each, observed and expected mass for each, the purity method, the test date and the laboratory. To see what exists for a lot, documentation can be requested through the contact page.

### What does Research Use Only mean for BPC/TB-500?

Both peptides are supplied only for laboratory research and analysis, not for human or veterinary use, ingestion, injection or any other form of administration.

### Does Veracue provide usage instructions for BPC/TB-500?

No. BPC/TB-500 is offered for laboratory research use only, and Veracue provides no dosing, administration or usage guidance of any kind.

More from Veracue Labs: https://veracuelabs.com/llms.txt