BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide supplied in lyophilised (freeze-dried) form. Its stability under various storage conditions is well characterised relative to many research peptides, but correct handling remains essential for maintaining research-grade integrity over time. This guide covers everything needed for correct storage from receipt through to use.
What lyophilisation does and why it matters
Lyophilisation is the removal of water from a product by freezing it and then reducing the surrounding pressure to allow the frozen water to sublimate directly from solid to gas. The result is a dry powder or cake with a residual water content typically below 3%. In this state, the peptide is significantly more stable than in solution because the primary degradation pathways — hydrolysis (water-mediated peptide bond cleavage), oxidation, and microbial growth — are substantially inhibited.
The quality of the lyophilisation process affects long-term stability. A properly lyophilised cake should appear white to off-white, intact, and free from discolouration. A poorly lyophilised product may show signs of collapse or melt-back, which indicates the primary drying cycle was incomplete and residual water content may be higher than acceptable.
Long-term storage: -20°C
For storage periods longer than a few weeks, -20°C is the standard condition for lyophilised BPC-157. At this temperature, molecular motion is reduced to the point where degradation reactions proceed extremely slowly. Studies on similar pentadecapeptides suggest stability of 2 years or more under correct -20°C conditions, provided the following additional requirements are met: the vial is sealed and not repeatedly opened; it is protected from light (amber vials or an opaque secondary container); it is stored in a low-humidity environment; and freeze-thaw cycling of the lyophilised material is minimised.
Short-term storage: room temperature
For periods of a few days to approximately 2-3 weeks, lyophilised BPC-157 can be stored at room temperature without significant degradation, provided the vial remains sealed and is kept away from direct light, moisture, and heat sources. This is relevant during transit or when refrigeration is temporarily unavailable. Beyond this window, room temperature storage is not recommended for research applications where peptide integrity is critical.
After reconstitution: 2-8°C
Once reconstituted with bacteriostatic water, BPC-157 should be stored refrigerated at 2-8°C. The bacteriostatic agent (benzyl alcohol, typically 0.9% in BAC water) inhibits bacterial growth, extending the usable window to approximately 4-6 weeks under correct refrigeration. However, peptide degradation through chemical pathways (hydrolysis, oxidation) continues even in the presence of a bacteriostatic agent. The 4-6 week guideline should be treated as a maximum, not a target.
Label every reconstituted vial with the date of reconstitution and the calculated concentration. This is essential for maintaining research records and for identifying vials that have exceeded their recommended storage period.
Receipt inspection
On receipt of any lyophilised peptide, inspect the vial before storage. The contents should appear as a white to off-white powder or cake. The vial should be intact with no cracks or broken seals. A slight vacuum may be present — this is normal and desirable, as it indicates the vial was sealed under reduced pressure after lyophilisation. Any vial with discolouration, visible moisture, or a compromised seal should be photographed and reported to the supplier immediately.
Signs of degradation
In lyophilised form: discolouration (yellowing or browning), a collapsed or sticky cake rather than a dry powder, or an unusual odour after reconstitution. In reconstituted form: cloudiness that does not clear on gentle swirling, visible particulate matter, discolouration of the solution, or an unusual odour. Any of these observations should be documented and the vial should not be used for research until the cause is determined.