Underground Biohacking
Recovery

BPC-157

Chris Hallewell, founder of Underground Biohacking

By , Founder, Underground Biohacking

Last reviewed

Research use only. Not FDA-approved. Banned by WADA (S0 category) since January 2022.

BPC-157 is a synthetic 15 amino acid peptide. Almost everything known about it comes from rats and mice, not people. In animals it speeds healing of tendon, ligament, gut and skin wounds. In people the evidence is three small uncontrolled pilot studies with fewer than 30 subjects between them. No controlled trial has tested whether it works or whether it is safe. It is not approved by the FDA for anything.

What is BPC-157?

BPC-157 stands for Body Protection Compound 157. It is a chain of 15 amino acids, which is why chemists call it a pentadecapeptide (a peptide 15 units long). The sequence was copied from a larger protein found in human gastric juice, the fluid your stomach uses to digest food. That origin matters. Most peptides fall apart fast in stomach acid. BPC-157 was singled out because it stays intact in human gastric juice. Researchers have given it to animals by mouth, by injection and as a cream, and it worked by all three routes. Its blood half life is short, but the effects in animals last much longer than the peptide does. It is not a hormone and not a steroid. It does not build muscle directly. In animals it acts on the plumbing of healing. It switches on VEGFR2 signalling (a switch that tells the body to grow new blood vessels). It also gets fibroblasts (the cells that lay down collagen) moving into a wound. That matters most in tissues with a poor blood supply, like tendon and ligament. It has no approved medical use, and no pharmaceutical grade version of it exists.

What is BPC-157 used for?

  • In a small retrospective chart review, 14 of 16 people reported relief of knee pain after injection into the joint.[1]Human study
  • In an uncontrolled pilot study, 10 of 12 women with interstitial cystitis said their bladder symptoms fully cleared after one treatment.[2]Human study
  • In rats whose Achilles tendon was cut clean through, treated animals regained tendon strength and closed the gap in the tendon.[6]Animal or lab study only
  • In rats with a surgically cut knee ligament, healing improved on function, strength and tissue measures across 90 days.[7]Animal or lab study only
  • In rats with chemically caused colitis and a joined section of bowel, both healed with treatment while untreated animals did not.[8]Animal or lab study only
  • In burned mice, a cream put on the burn improved every measure of wound healing the researchers tracked.[9]Animal or lab study only
  • In cultured rat tendon cells, it made the repair cells migrate faster, which is one step in how a tendon mends.[10]Animal or lab study only
BPC-157 dosage chart
Typical dose250-500mcg per day, split into 1-2 doses
Cycle length4-6 weeks, with 2-4 week break between cycles
FormInjectable (subcutaneous), oral capsules

How many units is your BPC-157 dose?

Enter your vial, water and dose. Get the units to draw.

Open the BPC-157 calculator →

How does BPC-157 work?

Body Protection Compound-157 is a synthetic peptide derived from human gastric juice. It promotes angiogenesis, upregulates growth hormone receptors, and accelerates tendon, ligament, and gut healing through nitric oxide and FAK-paxillin pathway modulation.

How much BPC-157 should you take?

250-500mcg per day, split into 1-2 doses

How long should you run BPC-157?

4-6 weeks, with 2-4 week break between cycles

How is BPC-157 supplied?

Injectable (subcutaneous), oral capsules

What are the side effects of BPC-157?

EffectHow seriousWhat to watch
There is no controlled human safety record for BPC-157. Nobody has tracked side effects in people over months or years.UnknownAnything new or unexplained. Tell any doctor you see that you are using it.
Product quality is the main practical risk. Material sold outside a pharmacy is unregulated and may be contaminated.[3]UnknownRedness, swelling or fever after an injection.
No pharmaceutical grade version has ever been made or validated, so the contents of any vial are unverified.[5]UnknownNothing you can check yourself. Assume the label is not reliable.
In the pilot study of 12 women with interstitial cystitis, no adverse events were reported and nobody dropped out.[2]None reported in that studyNone
Across the small human pilot studies no side effects were reported, but those studies were far too small to catch rare harm.[4]UnknownNone specific. Absence of reports is not evidence of safety.

Is BPC-157 legal in 2026?

Checked on 6 August 2026. The FDA lists BPC-157 on its page of bulk drug substances for compounding that may present significant safety risks. It sits in the section for substances whose nomination was withdrawn by the nominators, having previously been in category 2. The FDA's stated concern is that compounded BPC-157 may pose a risk for immunogenicity by some routes. It also says peptide impurities and ingredient characterisation are complex. The agency says it lacks enough information to know whether the drug would harm people. BPC-157 is not an approved medicine in the United States. A pharmacy compounding advisory committee vote is advice only and is not binding. Nothing about its status has changed.

Status checked against the primary source.

Where to buy BPC-157

Running BPC-157 in your next protocol cycle?

Check out our recommended sources list to find vetted vendors you can trust.

View sources

Where to source it

The hard part with BPC-157 isn't the protocol. It's finding a supplier that can prove what's in the vial. We assessed dozens against per-batch, third-party testing. A handful passed.

See the sources that passed →

BPC-157 protocols

Deep dives on BPC-157

Frequently Asked Questions

Does BPC-157 actually heal tendons in people?
Nobody knows. The tendon evidence is almost entirely rats. In one rat study a fully cut Achilles tendon regained its strength and closed. That result has never been repeated in a human trial. The only human musculoskeletal data is a chart review of 16 people with knee pain. It had no control group and no scans afterwards to show that tissue actually repaired. Encouraging is not the same as proven.
Is BPC-157 legal?
It is not an approved medicine in the United States. The FDA lists it among bulk substances for compounding that may present significant safety risks, and the nomination to permit it was withdrawn. A compounding pharmacy cannot lawfully make it for you. Buying it labelled as a research chemical does not change that position. It is also banned in professional sport, so a competing athlete risks a sanction by using it.
Is it safe?
The honest answer is that nobody knows. Animal safety work found no harm across several organ systems, and the small human pilot studies reported no adverse events. But those studies covered fewer than 30 people in total and ran for a short time. That is nowhere near enough to pick up anything rare or slow. The bigger day to day risk is what is actually in the vial, because no pharmaceutical grade product exists.
Can it help gut problems like colitis?
The gut claims come from rat work, not from people. In rats, chemically caused colitis and a surgically joined section of bowel both healed with treatment while untreated animals did not. The peptide was chosen partly because it survives stomach acid, which is why swallowing it is even plausible. But no completed controlled human trial has been published for any gut condition. So there is no human result to point to.
Will it cause a problem for a competing athlete?
Yes, potentially. BPC-157 is banned in professional sport. A 2025 systematic review says so plainly and tells clinicians to warn athletes about it. Whether a given testing panel detects it is a separate question, and no seller can honestly answer that for you. If you compete under any anti doping code, check your own sport's rules first. Never rely on a claim that something is undetectable.
What should I ask a doctor before considering it?
Ask three things. First, what is the actual evidence for my specific problem, and is any of it human? Second, where would the material come from and how would its purity be checked, given no pharmaceutical grade product exists? Third, what proven treatment am I delaying while I try this? A clinician who cannot answer the first two is guessing. Tell every other clinician you see that you are using it.

References

  1. 1.Lee E, Padgett B (2021). Intra-Articular Injection of BPC 157 for Multiple Types of Knee Pain. Alternative therapies in health and medicine. PMID: 34324435.
  2. 2.Lee E, et al. (2024). Effect of BPC-157 on Symptoms in Patients with Interstitial Cystitis: A Pilot Study. Alternative therapies in health and medicine. PMID: 39325560.
  3. 3.Vasireddi N, et al. (2025). Emerging Use of BPC-157 in Orthopaedic Sports Medicine: A Systematic Review. HSS journal : the musculoskeletal journal of Hospital for Special Surgery. PMID: 40756949. DOI: 10.1177/15563316251355551.
  4. 4.McGuire FP, et al. (2025). Regeneration or Risk? A Narrative Review of BPC-157 for Musculoskeletal Healing. Current reviews in musculoskeletal medicine. PMID: 40789979. DOI: 10.1007/s12178-025-09990-7.
  5. 5.Mateescu DM, et al. (2026). BPC-157 as an Investigational Peptide Therapeutic: Biopharmaceutical Challenges, Formulation Strategies, and Translational Development Barriers. Pharmaceutics. PMID: 42198317. DOI: 10.3390/pharmaceutics18050625.
  6. 6.Staresinic M, et al. (2003). Gastric pentadecapeptide BPC 157 accelerates healing of transected rat Achilles tendon and in vitro stimulates tendocytes growth. Journal of orthopaedic research : official publication of the Orthopaedic Research Society. PMID: 14554208. DOI: 10.1016/S0736-0266(03)00110-4.
  7. 7.Cerovecki T, et al. (2010). Pentadecapeptide BPC 157 (PL 14736) improves ligament healing in the rat. Journal of orthopaedic research : official publication of the Orthopaedic Research Society. PMID: 20225319. DOI: 10.1002/jor.21107.
  8. 8.Klicek R, et al. (2013). Stable gastric pentadecapeptide BPC 157 heals cysteamine-colitis and colon-colon-anastomosis and counteracts cuprizone brain injuries and motor disability. Journal of physiology and pharmacology : an official journal of the Polish Physiological Society. PMID: 24304574.
  9. 9.Mikus D, et al. (2001). Pentadecapeptide BPC 157 cream improves burn-wound healing and attenuates burn-gastric lesions in mice. Burns : journal of the International Society for Burn Injuries. PMID: 11718984. DOI: 10.1016/s0305-4179(01)00055-9.
  10. 10.Chang CH, et al. (2011). The promoting effect of pentadecapeptide BPC 157 on tendon healing involves tendon outgrowth, cell survival, and cell migration. Journal of applied physiology (Bethesda, Md. : 1985). PMID: 21030672. DOI: 10.1152/japplphysiol.00945.2010.

This content is for educational purposes only. These compounds are intended for research use. Nothing here is medical advice.