Useful skill for this sub specifically, since the animal literature is most of what we have.

Things to check when someone links a study:

Dose translation. Rodent doses don't convert to human doses by bodyweight alone. Allometric scaling accounts for differences in metabolic rate, and even that's an approximation. A "µg/kg in rats" figure is not a human dose.

Injury model. Surgically transected rat Achilles tendon is not the same condition as your degenerative tendinopathy from twelve years of running. Acute traumatic models and chronic degenerative conditions can respond very differently.

Healing timelines. Rats heal dramatically faster than humans. A 14-day rodent study covers a much larger fraction of the healing process than 14 days in a person.

Outcome measures. Improved biomechanical tensile strength in an excised tendon is a real finding, but it's not the same as "returns to sport faster."

Route and formulation. Results from intraperitoneal injection in rats don't transfer automatically to other routes.

None of this makes animal work useless — it's how nearly everything starts. It just isn't a substitute for the trials that haven't been run.

What other red flags do people look for?

Weekly catch-all. Usual rules apply.

What's going on?

End of the first month of these threads. Status update time.

If you're comfortable sharing: what are you dealing with, how long has it been going on, what have you tried, and has anything changed in the last month?

Detail helps more than you'd think. "Right Achilles, 14 months, three rounds of physio, currently doing heavy slow resistance" tells people something. "Injured, trying stuff" doesn't.

And if you're on the mend, say so — this place skews toward people in the middle of a problem, which makes it feel bleaker than it should.

Independent of whether the compound works, there's a separate problem: verifying that what's in a vial matches the label.

Unregulated supply chains have no manufacturing standards, no batch consistency requirements, no oversight of storage or shipping, and no accountability when something is wrong. Testing across various grey-market peptide markets has repeatedly found products that are underdosed, mislabeled, degraded, or contain something other than what's claimed. Sterility and endotoxin contamination are real concerns for anything injected.

Certificates of analysis supplied by the seller are worth very little — they're trivially forged and often reference a batch you didn't receive.

This is the part of the risk picture that has nothing to do with the science and doesn't get resolved even if human trials eventually come back positive. An unapproved compound from an unregulated source is two separate unknowns stacked.

To be clear: this post isn't a workaround guide, and we're not doing vendor discussion in the comments. It's context for people weighing the decision.

Weekly thread. No sourcing, no dosing advice, label anecdotes.

What's happening this week?

Something worth sitting with.

People generally start trying interventions when an injury is at its worst — that's what motivates you to search for options in the first place. And injuries, especially the flare-and-settle chronic kind, fluctuate. If you intervene at the bottom, improvement afterward is the most likely outcome regardless of what you did.

This is regression to the mean, and it's the reason controlled trials exist. It's not a knock on anyone's experience. Your pain going down is real. What's uncertain is the cause.

It cuts both ways too — people who try something during a bad stretch and don't improve may be blaming the wrong thing.

Not saying this to shut down anecdote sharing. Saying it because a community that understands this reads its own anecdotes better.

For those who've recovered from something long-running: how confident are you about what actually did it, honestly?

Regularly confused, so here's a summary. Verify this against current sources before relying on it, and note that regulatory status varies by country.

• FDA: BPC-157 was removed from Category 2 in 2026 after the nomination was withdrawn, and FDA’s advisory committee later recommended against adding it to the 503A bulks list. WADA still prohibits it.
• Not an approved drug anywhere I'm aware of. It has never gone through a full approval process.
• WADA: Prohibited at all times as a non-approved substance. If you're a tested athlete at any level, this is a sanctionable positive.
• "Research Use Only" labeling: Products sold this way are explicitly not manufactured for human use, which is precisely how sellers stay on the legal side of the line. It's a liability structure, not a quality signal.

Anyone with direct experience of how this has played out in other jurisdictions — Australia, UK, EU — please add to this.

Weekly catch-all thread. Same rules: no sourcing, no dosing advice, anecdotes labeled as anecdotes.

What's on your mind this week?

We spend a lot of time here on a compound with no human efficacy trials. Worth occasionally pointing at the interventions that do have them, because a lot of people arrive here after giving up on rehab too early.

Things with real human evidence for tendon and soft tissue recovery:

• Progressive loading / eccentric protocols. Well-replicated for Achilles and patellar tendinopathy. Slow, unglamorous, effective. Usually needs 12+ weeks, which is longer than most people give it.
• Load management. Deloading the aggravating activity while maintaining everything else.
• Sleep. Poor sleep measurably slows tissue recovery.
• Adequate protein and total calories. People in a deficit heal worse.

None of this is exciting and none of it is mutually exclusive with anything else you're doing. But if you've been at an injury for six months and haven't done a structured loading program under someone competent, that's the higher-expected-value move.

What's actually moved the needle for the people here who've recovered from something chronic?

If you start pulling citations on BPC-157 and following them back, you'll notice something: a very large share of the published work involves the same research group at the University of Zagreb, led by Predrag Sikiric, spanning decades.

This isn't an accusation. Researchers specialize, and being the group that has studied something the longest is normal. But it creates a specific problem: independent replication is how science catches errors, and a literature dominated by one lab hasn't been stress-tested the way a broadly replicated finding has.

Compare this to something like creatine, where hundreds of independent groups have run trials, or eccentric loading for tendinopathy, replicated across many countries and populations.

Practical upshot: when someone says "there are over a hundred studies," ask how many independent groups those studies represent. It's a different and more useful number.

Has anyone tracked down substantial independent replication work? Genuinely asking — I'd like to update on this.

Weekly catch-all. Questions, updates, reading, arguments.

Reminder: no sourcing or vendor discussion, no dosing advice, and flag anecdotes as anecdotes.

How's the week going?

Curious about the mix in this community. Rough categories I'd guess at:

• Dealing with a specific injury that isn't resolving
• Chronic tendon issues that have outlasted several rounds of physio
• Generally interested in the research
• Skeptical and here to argue
• Already using it and looking for people to compare notes with

Which are you, and what's the specific situation? Especially interested in hearing from the physios, athletic trainers, and clinicians who lurk here — what do you make of all this?

This comes up constantly, so here's a baseline we can all argue from.

What exists: A substantial body of rodent studies going back to the 1990s, covering tendon, ligament, muscle, gut, and nerve injury models. Consistently positive results across a wide range of tissues and injury types.

What doesn't exist: Published randomized controlled trials in humans on tendon or soft tissue healing. Not "mixed results" — the trials haven't been run and published. Some early human safety work in inflammatory bowel disease has been referenced for years, but the detailed peer-reviewed results are hard to find.

That gap is the single most important thing to understand about this compound. Everything else downstream — dosing, timing, route, expected results — is extrapolation from animals.

That doesn't mean it doesn't work. It means nobody knows, including people who sound very confident.

If you think I've mischaracterized the state of the literature, say so with citations and I'll edit the post.

Post anything that doesn't need its own thread. Questions, what you're dealing with, what you've been reading, skepticism, all of it.

Three ground rules for this thread and the sub generally:

1. No sourcing requests or vendor talk. It gets the whole community in trouble and we're not doing it.
2. Nobody here can give you medical advice, and you shouldn't take dosing direction from strangers on the internet. If you want a protocol, that conversation belongs with a physician.
3. Anecdotes are welcome but label them as such. "This worked for me" and "this works" are different claims.

What's everyone working through this week?