BPC-157 is a synthetic peptide made from a sequence of 15 amino acids. It comes as a white lyophilised powder — meaning freeze-dried — and needs to be stored correctly to stay stable. Here is what you need to know about what it is, how to keep it, and how to read its certificate of analysis.
What Is BPC-157 Peptide
BPC-157 is a research peptide derived from a protein found naturally in human gastric juice. Scientists isolated a specific 15-amino-acid sequence from that protein and synthesised it in the lab. The result is a stable, water-soluble compound used in preclinical research.
The name stands for Body Protection Compound 157. It is one of the most studied peptides in the research space, with a substantial body of animal studies examining its properties.
BPC-157 is not a natural extract. It is manufactured through solid-phase peptide synthesis — a process where amino acids are added one at a time to a growing chain on a solid support bead, then cleaved off and purified. The final product is a defined, reproducible molecule, not a mixture.
What Is BPC-157 Made Of
BPC-157 is a chain of 15 amino acids in a specific sequence: Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. Those are all standard amino acids — nothing exotic. The sequence is what makes it distinctive.
The molecular weight is 1,419 daltons, which puts it in the middle range for research peptides. It carries a net negative charge at neutral pH, which affects how it behaves in solution.
Because it is fully synthetic and does not contain animal-derived ingredients, batch-to-batch consistency is high when the manufacturer controls the synthesis process properly.
BPC-157 Storage
Lyophilised powder (unreconstituted): Store at -20 °C in a sealed vial. At that temperature, properly prepared powder is stable for 24 months or longer. If you cannot keep it at -20 °C, a standard freezer at -4 °C is acceptable for several months, though the margin for error shrinks. Room temperature is fine for a few days in transit, but do not store it there long-term.
After reconstitution: Once the peptide is in solution, keep it at 2–8 °C — a standard lab refrigerator. Use it within 4 weeks. Reconstituted peptide degrades faster than powder because water drives chemical breakdown. Freezing reconstituted peptide is possible but each freeze-thaw cycle causes some loss, so aliquot before freezing if you plan to do that.
BPC-157 Storage: the short version
- Powder, long-term: -20 °C, sealed, away from light
- Powder, short-term: 2–8 °C for up to a few months
- Reconstituted: 2–8 °C, use within 4 weeks
- Avoid repeated freeze-thaw cycles once in solution
- Keep vials away from direct light — UV accelerates breakdown
The biggest enemy of BPC-157 in solution is water combined with warmth. A peptide left at room temperature in solution can lose a meaningful fraction of its integrity within days. Cold slows that process significantly.
BPC-157 COA and Purity Testing
A COA — certificate of analysis — is the document that records the test results for a specific batch of peptide. Every vial should be traceable to a COA. Without one, you have no way to know what is actually in the vial.
What a BPC-157 COA Should Show
A credible COA includes:
- Purity by HPLC — high-performance liquid chromatography separates the peptide from impurities and measures how much of the total is the target compound
- Molecular weight confirmed by mass spectrometry — confirms the molecule is actually BPC-157 and not something similar
- Batch or lot number — ties the document to specific vials
- Date of analysis
BPC-157 Purity
BPC-157 purity of 99% means that 99% of the material tested is the correct peptide, and 1% is other compounds — synthesis by-products, truncated sequences, or residual solvents. Research peptides are typically sold at 98% or higher.
BPC-157 99% purity is a common specification and is achievable with good synthesis and purification. The practical difference between 98% and 99% is small for most research applications. The difference between 95% and 99% matters more, because at 95% you have a much larger fraction of unknowns.
HPLC is the standard method for measuring peptide purity. Mass spectrometry confirms identity. Both should appear on a COA. A COA showing only one of the two tells an incomplete story.
If you receive a COA, check that the batch number on the document matches the batch number on your vial. A COA for a different batch is not evidence of anything about the vial in your hand.
BPC-157 is a well-characterised, synthetically manufactured peptide. Store the powder cold and dry, keep any solution refrigerated, and always check that your COA covers the batch you actually received.
NXT Labs products are sold strictly as research chemicals for in vitro research, laboratory testing and analytical purposes only, and are not intended for use in any human or animal application.
NXT Labs supplies research peptides for laboratory use. Browse the full range or view current Certificates of Analysis.
