BPC-157
Body Protection Compound 157
A gastric-juice-derived peptide with an unusually broad animal literature on tissue repair — and a persistent absence of human trials.
Last reviewed · 2 references
How it works
BPC-157 is a synthetic fragment of a protein found in human gastric juice. In animal models it accelerates healing across tendon, muscle, gut and nerve tissue, apparently by upregulating VEGF and promoting angiogenesis, and by interacting with the nitric oxide system. A substantial body of rodent work also reports effects on the gut-brain axis and on dopaminergic systems.
Animal studies only. Findings come from rodent or in-vitro models. Animal results frequently fail to replicate in people.
What the research reports
- Accelerated tendon, ligament and muscle healing in rodents
- Protection and healing of gut mucosa, including NSAID-induced damage
- Peripheral nerve regeneration after crush injury in rats
- Counteraction of dopamine-system disturbances in rodent models
What it has not been shown to do
- No published randomised controlled trial in humans
- Banned by WADA for competitive athletes
- The gut-brain and dopamine findings are entirely rodent-based
Dosing reference
Commonly cited research amounts are 200–500 mcg/day, often subcutaneously near the injury site. This is community convention, not a trial-derived dose.
Calculate my dose for BPC-157- Routes studied
- Subcutaneous, Oral
- Half-life
- Short in plasma; reported to be unusually stable in gastric juice
- Cycle length in the literature
- Community protocols run 4–8 weeks, then a break
Working out a draw volume from a vial? Use the free reconstitution calculator.
Side effects and contraindications
Reported side effects
- Injection-site reaction
- Nausea in some users
- Reported as well tolerated in animals, but human data is anecdotal
Do not use if
- Active or historic cancer — the angiogenic mechanism is a genuine theoretical concern
- Pregnancy and breastfeeding
- Competitive athletes under WADA testing
The practice that shares the mechanism
The gut-brain findings are the interesting part for mental health, and they point straight back at the vagus nerve. Vagal tone work and gut-supportive nutrition act on the same axis with none of the regulatory ambiguity.
What amplifies it
- Protein and collagen substrate — repair is substrate-limited
- Sleep, when growth hormone pulses and most tissue repair occurs
- Loading the tissue appropriately; unloaded tendon does not remodel well
Mechanism hubs
- Dopamine & driveWhat dopamine actually governs, why anhedonia is a motivation problem rather than a pleasure problem, and where peptides and practice fit.
- Nerve regenerationPeripheral nerves regenerate at roughly a millimetre a day. The central nervous system largely does not. What that means for peptides and practice.
- Inflammation & moodWhy inflammatory markers are elevated in a subset of depression, what causes it, and which peptides and practices act on the pathway.
Stacks that include it
- Nerve repairPeripheral nerve and soft tissue recovery: the animal evidence, the WADA and cancer considerations, and the loading protocol that matters more.
- Recovery & nervous systemFor the flatness of early recovery: what the dopamine baseline is doing, the limited peptide research, and the practices that carry it.
Common questions
- Largely economics. It is a short peptide with limited patent protection, which makes it hard to justify the cost of a trial programme. That is a commercial explanation, not evidence of safety.
- There is rodent evidence that it influences dopaminergic and serotonergic systems and protects against certain drug-induced disturbances. There is no human evidence. Treat the mental-health angle as a hypothesis about the gut-brain axis, not a finding.
Sources & evidence notes
Findings come from rodent or in-vitro models. Animal results frequently fail to replicate in people.
Confidence score 7/100
Preliminary
Mechanism only. Nothing here establishes that a person would feel anything.
- 1.
Journal of Orthopaedic Research, 2003 · Source (opens in a new tab)
In vitroLimited gradeCells or tissue in a dish. Tells you about mechanism, not about outcomes. - 2.
Current Neuropharmacology, 2016 · Source (opens in a new tab)
In vitroLimited gradeCells or tissue in a dish. Tells you about mechanism, not about outcomes.