BPC-157
Also known as Body Protection Compound 157, Pentadecapeptide BPC 157, PL 14736, Bepecin
BPC-157 is a 15 amino acid fragment of a protective protein found in human gastric juice. People use it for tendon, ligament, muscle and gut healing, and it is one of the most widely used research peptides in the recovery space.
Overview
BPC-157 is a synthetic peptide made up of 15 amino acids. Its sequence is taken from a larger protective protein that occurs naturally in the stomach lining, which is where the name Body Protection Compound comes from. It was first characterized by a research group in Zagreb, Croatia in the early 1990s, and that same group is responsible for the large majority of published studies on it. It is stable in gastric acid, which is unusual for a peptide and is why it has been studied both orally and by injection.
The animal evidence is extensive. Dozens of rodent studies report faster healing of cut Achilles tendons, crushed muscles, ligament injuries, bone fractures, skin wounds and various gut injuries including ulcers, fistulas and colitis. There are also rodent studies on nerve repair, protection against drug toxicity and vascular effects. The consistent theme is that the peptide promotes new blood vessel growth and cell migration at the site of damage.
Human evidence is thin. A small number of early phase trials were run for inflammatory bowel disease, and one small trial looked at knee pain with intra-articular injection. Results were described as favorable but were never followed by large controlled trials. Almost everything people cite about BPC-157 in humans comes from anecdote. It is also worth knowing that nearly all the rodent work comes from a single lab, so independent replication is limited.
How it works
BPC-157 is thought to work mainly by upregulating growth factor signaling at injury sites. It increases expression of VEGF and its receptor, which drives angiogenesis, the formation of new capillaries that feed a healing wound. It also activates the FAK-paxillin pathway, which helps fibroblasts and tendon cells migrate into damaged tissue and lay down new collagen. In the gut it appears to interact with the nitric oxide system and protect the mucosal barrier. Some researchers also point to modulation of dopamine and serotonin systems as a reason it affects mood and gut motility in animals. Much of this is inferred from rodent tissue, not human data.
What the research shows
- rodentAccelerated healing of surgically cut Achilles tendon in rats, with improved biomechanical strength and tendon-to-bone reattachment.
- rodentReduced gastric ulcer formation and protected the stomach lining against NSAIDs and alcohol in rats.
- in vitroPromoted tendon fibroblast migration and survival in culture via FAK-paxillin signaling.
- rodentImproved healing of muscle crush injury and restored function in rodents when given systemically or locally.
- human pilotSmall human trials for ulcerative colitis and knee pain reported tolerability and some benefit, but were never published as full controlled trials.
Evidence labels: rodent and in vitro mean no human data for that finding. Human pilot means small, often uncontrolled. Human RCT means randomized and controlled. Clinical means an approved drug with regulatory data.
Dose calculator
U-100 insulin syringeUnits are a volume on the syringe, not an amount of peptide. Concentration changes every time you change the water volume. The standalone calculator explains the math.
Dosing and protocol
Commonly reported at 250 to 500 mcg once or twice daily. Some protocols go to 1 mg per day for acute injuries.
4-8 weeks, then reassess. Some people run it only while an injury is healing.
Often injected subcutaneously as close to the injury as is practical, though systemic dosing appears to work in animals too. Oral capsules are used mainly for gut complaints.
| Vial | Suggested water | Concentration | Low dose draw |
|---|---|---|---|
| 5 mg | 2 mL | 2.5 mg/mL | 10 units |
| 10 mg | 2 mL | 5 mg/mL | 5 units |
Lyophilized: freezer or fridge, away from light, stable for months. Reconstituted: fridge 2-8C, use within 4 weeks.
Cautions
- ▲Almost all evidence is from rats. Human dosing is extrapolated, not established.
- ▲Because it promotes new blood vessel growth, there is a theoretical concern about feeding existing tumors. No human data either way.
- ▲Prohibited in sport under WADA rules (S0, non-approved substances).
- ▲Reported side effects are mild: injection site irritation, nausea, occasional headache or dizziness.
- ▲Product quality varies a lot between vendors. Third party testing matters more than brand claims.
Commonly stacked with
The classic recovery pairing. TB-500 works systemically on cell migration while BPC-157 is used locally, and the two are thought to cover different parts of the healing process.
GHK-Cu adds collagen remodeling and skin repair, so the pair is used for wound and post-surgical healing.
For gut-focused protocols, KPV adds direct anti-inflammatory action in the intestinal lining.
Frequently asked
Does BPC-157 work orally?
It is stable in stomach acid and oral dosing worked in rodent gut studies, so oral use makes sense for stomach and intestinal complaints. For tendon or muscle injuries, most people inject it because the systemic absorption of oral peptide is uncertain. There is no human study comparing the two routes.
Do I need to inject it right at the injury?
Rodent studies show benefit with both local and systemic administration, so it is not strictly necessary. Many people still inject near the injury on the theory that local concentration helps. Never inject directly into a tendon or joint capsule unless you have clinical training.
Is BPC-157 legal?
It is not an approved drug anywhere. In the US it is sold as a research chemical, and in late 2023 the FDA placed it in the category of bulk substances that compounding pharmacies may not use. Possession for personal use is generally not a crime, but it cannot be legally sold for human consumption.
How fast does it work?
Anecdotally people report reduced pain within days and noticeable functional improvement over two to four weeks. Rodent tendon studies show measurable differences within a week. Chronic injuries tend to take longer than acute ones.
References
- Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract (review). Current Pharmaceutical Design, 2011
- Achilles tendon healing in rats with BPC 157, tendon-to-bone reattachment. Journal of Orthopaedic Research, 2003
- BPC 157 promotes tendon fibroblast outgrowth and migration via FAK-paxillin pathway. Journal of Applied Physiology, 2011
- Brain-gut axis and pentadecapeptide BPC 157: theoretical and practical implications (review). Current Neuropharmacology, 2016