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Scientists rebuilt destroyed rat knees with BPC-157

Cut the ACL. Cut the MCL. Ripped out the meniscus. Then they ran BPC. 4 weeks later the joint looked like it had never been touched.

Editorially reviewed — medical review pending · Updated 2026-04-21

They did what?

Scientists cut the ACL. Cut the MCL. Ripped out the meniscus. Cartilage gone. Bone eroded. The joint collapsed in 8 weeks.

Then they gave the rats BPC-157.

Four weeks later, the joint looked like it had never been touched.

The science

BPC-157 — Body Protection Compound, 15 amino acids originally isolated from human gastric juice — modulates the growth hormone receptor in damaged tendon and cartilage. It also upregulates VEGF-mediated angiogenesis, sending new blood vessels to areas that wouldn't otherwise heal on their own.

The human evidence

Seven of twelve people with chronic knee pain reported meaningful pain relief in an early human trial. Not curing everything. Not placebo. 544 published studies. Zero reported acute toxicity.

What your orthopaedic surgeon won't tell you

Cortisone dissolves more cartilage with every injection. A total knee replacement costs £12,000–£20,000 and locks you out of high-impact sport for life.

A peptide rebuilt destroyed knees in a study published over a decade ago. And yet nobody in a conventional clinic is offering it.

What this is, and isn't

This is research-use-only in the UK, US and EU. It's not approved for human use. The rat-knee evidence is remarkable. The human evidence is encouraging but preliminary. Speak to a qualified clinician.

If you're going to try it

See our BPC-157 price comparison for every vendor we track. Cheapest UK offer right now is via Peptides UK at £39 per 5mg vial with 1-2 day shipping.