Overview
In plain English
BPC-157 is a 15-amino-acid fragment of a protein first identified in human gastric juice. It is one of the most widely studied compounds in the tissue-repair research category.
The published work is preclinical: rodent and in vitro models of tendon, ligament and muscle injury, gastrointestinal mucosal integrity, and nitric oxide signalling, in which it is reported to increase blood vessel growth into damaged tissue and the migration of repair cells. Strictly for laboratory research use. Not for human or veterinary consumption.
- What it isA 15-amino-acid pentadecapeptide, stable in gastric acid
- Mainly studied forAngiogenic signalling, tendon and mucosal repair models, nitric oxide modulation
- Supplied asLyophilised powder, 10mg vial, independently assayed
How it works
What it actually does
Tissue repair is limited by blood supply. Tendon and ligament have very little of it, which is why injuries to those tissues take months rather than weeks to remodel in the published models.
BPC-157's main reported effect is on that bottleneck. In animal studies it is associated with new blood vessel growth into damaged tissue, and with the migration of repair cells toward the site.
Almost all of the evidence is from animal and laboratory work. Human data are limited, and the compound is not a licensed medicine in any jurisdiction.
The science in detail
BPC-157 is a 15-residue fragment corresponding to a partial sequence of Body Protection Compound, a protein isolated from human gastric juice. It carries no cysteine residues and no disulphide constraint, and is notable within the peptide literature for resisting hydrolysis in gastric acid — the property from which the "stable gastric pentadecapeptide" designation derives.
No single high-affinity receptor for BPC-157 has been identified. The mechanistic literature instead describes convergence on two systems. The first is angiogenic signalling. Hsieh et al. (Journal of Molecular Medicine, 2017) reported that BPC-157's pro-angiogenic activity is associated with activation and upregulation of VEGFR2, with downstream signalling through the Akt–eNOS axis; VEGFR2 blockade attenuated the effect. This places the compound upstream of endothelial cell migration and tube formation rather than acting as a direct growth factor mimetic.
The second is the nitric oxide system. Work from Sikirić's group and others reports that BPC-157 modulates NO production bidirectionally, counteracting both L-NAME-induced NO blockade and L-arginine-induced NO excess in the same models. Hsieh et al. (Scientific Reports, 2020) described modulation of vasomotor tone via a Src–caveolin-1–eNOS pathway. The practical consequence in these models is homeostatic rather than unidirectional: the peptide appears to restore perturbed NO signalling in either direction.
In connective tissue specifically, Chang et al. (Journal of Applied Physiology, 2011) reported increased tendon fibroblast outgrowth, survival and migration in vitro, with associated changes in focal adhesion kinase and paxillin signalling — the machinery governing cell adhesion and directed migration during repair.
This distinguishes BPC-157 from TB-500, the adjacent recovery-research compound. TB-500 acts intracellularly on the actin cytoskeleton through G-actin sequestration. BPC-157's described actions are predominantly extracellular and vascular. The two are frequently studied together for that reason.
The entire evidence base is preclinical — rodent and in vitro. Human clinical trial data are limited, and reviews such as Józwiak et al. (Pharmaceuticals, 2025) are explicit about this gap.
Evidence
What the research shows
Angiogenesis in damaged tissue
In animal studies it is associated with new blood vessel growth — the main constraint on tendon and ligament repair.
Repair cell migration
Laboratory work on tendon fibroblasts reported faster outgrowth, better survival and improved directed migration.
Gastric and intestinal mucosal models
A large share of the published work examines protection of the stomach and intestinal lining in rodent models.
Evidence is preclinical
The research is overwhelmingly animal and in-vitro. Controlled human trial data remain limited.
Reconstitution & handling
Reconstitution and handling in the laboratory
These are general handling notes for the lyophilised peptide supplied by Purist Peptides. They describe the preparation of a stock solution for laboratory work. They are not a dosing protocol, and they describe no administration to a person or an animal.
A 3ml vial of bacteriostatic water is included free with every peptide vial you order, so the material can be reconstituted on arrival.
BPC-157 10mg — preparing a stock solution
Choice of diluent
Bacteriostatic water (water for injection with 0.9% benzyl alcohol) is the usual diluent where a stock will be drawn from repeatedly, because the preservative permits several septum entries across a working period. Sterile water for injection and sterile 0.9% sodium chloride are both used where a single-use preparation is wanted instead. The diluent volume sets the concentration of the stock, so record it.
Sterile technique
- Allow the sealed vial to reach room temperature before opening the carton — reconstituting a cold lyophilised cake slows dissolution
- Work in a clean area or a laminar flow cabinet, and wipe the rubber septum with 70% isopropyl alcohol, letting it dry fully
- Draw the chosen volume of diluent using a sterile single-use syringe and needle
- Angle the needle so the diluent runs down the inside wall of the vial — do not direct the stream onto the lyophilised cake
- Roll the vial gently between the palms until the cake has dissolved completely. Do not shake and do not vortex: peptides are surface-active, and agitation drives foaming and aggregation
- Let the vial stand for 5 to 10 minutes. A correctly reconstituted solution is clear and free of visible particles
Working out the concentration
Concentration follows from the mass in the vial and the volume of diluent added, nothing else. Adding 2ml of diluent to the 10mg vial gives a 5mg/ml stock; adding 1ml gives 10mg/ml. Label every reconstituted vial with its concentration and the date it was prepared.
Storage and stability
Before reconstitution
The lyophilised powder is the stable form. Sealed vials are best held at −20°C, protected from light and from moisture; the short periods at 2 to 6°C that occur in transit and on arrival are expected and are accounted for in the supply chain. Keep the vial in its carton — light and humid air are the two ordinary causes of loss on storage.
After reconstitution
Hold reconstituted solution at 2 to 6°C and protect it from light. Do not freeze a working stock: freeze-thaw cycling is the main avoidable cause of degradation and of visible precipitate. Where material must be held beyond a short working period, aliquot the stock into sterile low-binding tubes and freeze the aliquots once at −20°C or below, thawing each aliquot only once.
Checks before use
Inspect every vial against a light source. Discard any solution that is hazy, discoloured or contains particles, and any vial whose septum integrity is in doubt. The independent HPLC assay report for the batch supplied is available on request.
Strictly for laboratory research use. Not for human or veterinary consumption.
Questions
Frequently asked questions
What is BPC-157 studied for?
Published preclinical work covers tendon, ligament and muscle injury models, gastrointestinal mucosal integrity, and nitric oxide signalling. Reviews including Józwiak et al. (Pharmaceuticals, 2025) survey this literature. The work is overwhelmingly rodent and in vitro; human clinical evidence is limited.
How does BPC-157 differ from TB-500?
BPC-157's described actions are largely extracellular and vascular, centring on VEGFR2 and nitric oxide signalling. TB-500 acts intracellularly, sequestering G-actin and influencing cytoskeletal remodelling and cell migration. Because the mechanisms are distinct rather than overlapping, the two are commonly examined in parallel.
Does BPC-157 bind a specific receptor?
No single high-affinity receptor has been identified. The mechanistic literature describes convergence on VEGFR2-associated angiogenic signalling and on modulation of the nitric oxide system, rather than a defined ligand-receptor pair. This remains an open question in the field.
Why is it described as "stable gastric"?
The designation reflects the peptide's reported resistance to hydrolysis in human gastric juice, a property unusual among peptides of this size and the basis of much of the early gastrointestinal research interest.
How is purity verified?
Every batch is assayed by independent HPLC at Bioindustrial Services in Boksburg. We do not rely on the manufacturer's own certificate alone. The assay report for the batch you receive is available on request, and our full testing protocol is set out at Quality Standards.
How long does delivery take?
Orders are dispatched from South Africa, with timelines varying by region and courier. Current dispatch and transit windows are set out at Delivery Process.
Can I return an order?
Because these are laboratory compounds, returns are not accepted once an order has shipped. If your parcel arrives damaged, contact us within 48 hours with photographs of the packaging and product and we will arrange a replacement. The full terms are set out in our Refund Policy.
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