A 15-amino acid synthetic peptide derived from human gastric juice protein. Uniquely stable in gastric acid, BPC-157 is one of the few peptides observed in both injectable and oral protocols.
Body Protection Compound-157 (BPC-157) is a synthetic pentadecapeptide — a 15-amino acid sequence — originally isolated from human gastric juice. It is classified as a healing peptide due to the pharmacological interest surrounding its tissue-protective properties observed in preclinical models.
What distinguishes BPC-157 from most other peptides in common use is its remarkable stability in gastric acid. Most peptides degrade rapidly in the stomach's acidic environment, limiting them to injectable administration. BPC-157 retains structural integrity through the digestive tract, making it one of the rare peptides observed in both oral and subcutaneous protocols.
BPC-157 has a very short half-life of approximately 30 minutes, which positions it as a compound requiring daily administration in most observed protocols. Despite the rapid clearance, the peptide's pharmacokinetic profile supports consistent daily dosing to maintain tissue exposure.
BPC-157's pharmacological activity has been studied across multiple pathways in preclinical research. The peptide's mechanisms are not fully characterized, but several key pathways have been identified in published literature:
BPC-157 has been observed to interact with the nitric oxide (NO) system in animal models, potentially influencing vasodilation and local blood flow dynamics at tissue level.
Preclinical data suggest BPC-157 may influence the expression of growth factors involved in tissue repair processes, including VEGF (vascular endothelial growth factor) and FGF (fibroblast growth factor).
Unlike most peptides that denature in acidic environments, BPC-157's amino acid sequence confers stability at low pH. This unique property is directly related to its origin as a fragment of a gastric juice protein, enabling oral bioavailability.
Understanding BPC-157's pharmacokinetic profile is essential for interpreting dosing frequency and route selection in observed protocols.
| Parameter | Value |
|---|---|
| Half-Life | ~30 minutes |
| Bioavailability (SubQ) | ~95% |
| Time to Peak | ~30 minutes |
| Duration of Activity | ~8 hours |
| Routes | Subcutaneous, Oral |
| Molecular Weight | 1,419.53 g/mol |
| Amino Acid Count | 15 |
BPC-157's short half-life of approximately 30 minutes means that blood concentration peaks rapidly after subcutaneous injection and declines quickly. However, the duration of pharmacological activity (~8 hours) extends beyond what the half-life alone would suggest, indicating tissue-level activity that persists after circulating levels diminish.
The high subcutaneous bioavailability (~95%) means that nearly all of the injected peptide reaches systemic circulation. Oral bioavailability is lower but still notable for a peptide — a direct consequence of BPC-157's gastric acid stability.
The following protocols represent commonly observed dosing patterns reported across the peptide community. These are observational summaries, not recommendations.
BPC-157 is supplied as a lyophilized (freeze-dried) powder and requires reconstitution before use. The following steps outline the standard preparation process.
You'll need the BPC-157 vial (typically 5 mg), bacteriostatic water, an insulin syringe for drawing, and alcohol swabs for sterilization.
Clean the rubber stoppers on both the BPC-157 vial and bacteriostatic water vial with alcohol swabs. Allow to air dry briefly.
Draw 2 mL of bacteriostatic water into the syringe. With a 5 mg vial, this yields a concentration of 2,500 mcg/mL (each 10 units on an insulin syringe = 250 mcg).
Insert the needle into the BPC-157 vial and slowly release the water along the inside wall of the vial. Do not spray directly onto the powder — let it run down the glass to preserve peptide integrity.
Once the water is added, gently swirl the vial until the powder is fully dissolved. Do not shake vigorously — peptides can denature with aggressive agitation. The solution should be clear.
Store the reconstituted vial in the refrigerator (2–8°C). Reconstituted BPC-157 with bacteriostatic water is generally stable for up to 4 weeks when refrigerated. Do not freeze reconstituted peptide.
5 mg vial + 2 mL bac water = 2,500 mcg/mL. For a 250 mcg dose, draw 10 units (0.1 mL) on a standard U-100 insulin syringe. Use the Milligram reconstitution calculator for custom vial sizes.