The molecule we identify.
The assays we run on BPC-157.
The failure modes we see most.
- 01Des-Gly truncations from incomplete N-terminal coupling. The des-Gly variant is -57 Da and inflates HPLC purity if the gradient doesn't resolve it from the main peak. LC-MS catches it.
- 02Oxidized variants. BPC-157 contains a tryptophan residue prone to oxidation. The +16 Da variant typically co-elutes very close to main peak — gradient tuning is the resolution mechanism.
- 03Net Peptide Content variability. Research-grade BPC-157 spans 65-90 % NPC. The label-claim vs actual-active gap is the most common buyer complaint we hear about.
- 04Bulk powder vs lyophilized vial discrepancies. The same labeled material can have very different NPC depending on whether it was lyophilized or vacuum-dried.
- 05Sterility passes at the lot level but the reconstituted vial fails. The bacteriostatic water frequently fails its own LAL spec.
Transparent panels for BPC-157.
Identity (LC-MS) + Purity (HPLC) + Net Content on one public COA — the base receipt every vial should carry. Catches the des-Gly variant and the label-vs-actual gap.
- LC-MS identity confirmation
- HPLC purity % + impurity peaks
- Net Content (mg per vial)
- Public COA + accession #
- 5–7 day turnaround
Base + Endotoxin (USP <85>) + Sterility (USP <71>). The injectable-grade package.
- Everything in COA Essentials
- Endotoxin (LAL) USP <85>
- Sterility USP <71>
- 5–7 day turnaround
Base + Endotoxin + Heavy Metals + Sterility + Bioburden on one COA. Batch Conformity (3 vials) is $899.
- Everything in Injectable Safety
- Heavy metals (ICP-MS) USP <232>
- Bioburden USP <61>
- Add Batch Conformity (×3 vials): $899
BPC-157 testing — the common questions.
What's the most common BPC-157 quality issue you find?+
Two: (1) related-peptide impurities, especially the des-Gly variant from incomplete N-terminal coupling, which can run 2-5 % of total area and is missed by HPLC-only panels with weak gradient resolution; and (2) Net Peptide Content gap — research-grade BPC-157 averages 76-86 % NPC, so a vial labeled '5 mg' usually carries 3.8-4.3 mg of active. Our base COA ($189) catches both — it includes LC-MS identity (for impurity speciation) and Net Content on every peptide.
Should I test BPC-157 acetate or BPC-157 arginate salt forms?+
Both are tested the same way. Identity by LC-MS is identical (same parent ion mass), and HPLC purity is identical. The salt form changes the counter-ion (acetate vs arginate vs TFA), so the TFA / acetate residual assay reports against whatever's actually in the vial. Arginate is less common; acetate is the most-frequently-encountered. Note both salt forms on the submission so we tune the IC method appropriately.
Is the orally-stable BPC-157 (arginate) really stable?+
We can confirm intact peptide content in lyophilized form at receipt and on reconstitution; oral bioavailability and gastric stability are separate clinical pharmacology questions we don't address. For accelerated-stability work on lyophilized vials (storage at 25 °C / 40 °C / 60 % RH at intervals), we offer add-on stability time points for $99 per pull.
What sample size do you need for the full BPC-157 panel?+
Purity ($189): single 2 mg sealed lyophilized vial. Injectable Safety ($499): same single vial. Vendor Full QC ($749): two additional vials for the destructive sterility and endotoxin tests. Send the original sealed vials by overnight courier — lot and batch labels matter for chain of custody.
How do you compare to other BPC-157 testing options?+
Our base COA bundles Identity + Purity + Net Content for $189, where Vanguard charges purity ($249) plus identity ($200) and Janoshik adds net content (~$120) on top of its ~$110 base. Injectable Safety (base + endotoxin + sterility) is $499 vs Vanguard's Gold (~$500); Vendor Full QC is $749 vs Vanguard Elite ($700) and Janoshik ($828). Everything we publish is on a public accession-verifiable COA at coa-lookup.
Do you test BPC-157 blends with TB-500 or other peptides?+
Yes. Combination products like 'BPC-157 + TB-500' or 'BPC-157 + TB-500 + GHK-Cu' (sometimes called 'GLOW') are tested with two-component or three-component HPLC quantification on a single chromatogram. Each component reported with its own purity %, retention time, and identity. Add one tier up from the Purity panel if you're submitting a blend — the multi-component method is included in Injectable Safety and higher.
Other repair / gastric protection peptide testing —
Thymosin β4 fragment — the other half of the popular BPC + TB blend. Same HPLC + MS + NPC bench.
GLP-1 receptor agonist (Ozempic / Wegovy active). Same HPLC + MS + NPC + TFA bench.
Full peptide menu — all bundles, panels, and compounds across all peptide classes we cover.
Verify the vial. Sign the COA.
HPLC purity, LC-MS identity, NPC, TFA, endotoxin, sterility — Houston bench, public COA, transparent pricing.