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Research area

Peptides and tissue repair

The regeneration literature is older than most of this catalogue and largely built on animal models. That is worth knowing up front, because it shapes what the papers can and cannot show.

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The mechanism

Repair is a local process

Tissue that has been damaged goes through a sequence: inflammation, new blood vessel formation, matrix deposition, remodelling. Each stage is driven by signalling molecules, and each stage is a separate place where a peptide could in principle intervene. Most of the research here is about identifying which stage a given compound touches.

That is also why the results are hard to generalise. A compound that influences angiogenesis in a rat tendon model has demonstrated something specific about that model. Extrapolating it to a different tissue, let alone a different species, is a step the papers themselves are usually careful not to take.

The two most studied molecules here are frequently discussed as a pair, largely because early work looked at them side by side. They are not variants of each other and their proposed mechanisms differ.

What is being investigated
  • Angiogenesis and new vessel formation
  • Fibroblast migration and matrix deposition
  • Inflammatory signalling in the early repair phase
  • How much of the work is in vivo versus in vitro

Where this sits legally

Neither of the two main compounds in this area holds an approval anywhere. That is worth knowing before you read a page elsewhere that implies otherwise.

In this area

Compounds studied here

Four items, including the one capsule product where the gut is the target.

Where we stop

What this page leaves out

Nothing here says a compound heals anything. The regeneration work is largely animal research examining specific stages of a repair process in specific tissues, and the papers themselves are careful not to generalise beyond that. We are not going to be less careful than the researchers were.

Frequently asked

Questions about this area

Largely about how far animal work can reasonably be extrapolated.

Why are BPC-157 and TB-500 always mentioned together?
Mostly history. Early work looked at them alongside each other and the pairing stuck. Their proposed mechanisms are different, and reading either literature as if it applied to both is a mistake the papers do not make.
How strong is the evidence in this area?
It is largely animal work, and a lot of it comes from a small number of research groups. That is not a reason to dismiss it, but it is a reason to be careful about how far you extrapolate. Independent replication is thinner here than in the metabolic literature.
Is TB-500 the same as thymosin beta-4?
No. TB-500 is a synthetic fragment of that protein, not the protein itself. They are routinely sold under one name, which makes comparing studies harder than it should be. The individual file spells out where the difference matters.
Why is there a capsule product in this area?
Because the target sits in the gut, which is one of the two situations where the oral route is worth studying at all. That is the exception rather than the rule, and the capsules page explains why the list is so short.
Does purity matter more for these compounds?
It matters equally everywhere, but it is more often questioned here because the compounds are widely copied. A batch number that ties to an independent analysis is the only thing that settles it.
Before you order

Judge the material, not the claims

We can tell you what is in the vial and prove it. What the literature shows is set out on the compound pages, including where it is thin. Everything else is someone else’s marketing.

For laboratory and research use only. Not for human or animal consumption. Not a medicine and not a food supplement. Sold to persons aged 18 and over. Compounds named on this page may appear on the WADA prohibited list.

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