T-500 Peptide

What TB-500 is

TB-500 is a synthetic fragment of thymosin beta-4, a protein involved in cell migration and tissue repair. Like most of this category it is supplied for research use and is not a licensed medicine. This section carries 17 lines from £40 to £348, clustered near £87.

What the research supports

Thymosin beta-4 has a genuine research literature around wound healing, cell migration and angiogenesis — most of it in animal models and cell culture. The mechanism is plausible and reasonably well characterised.

What does not exist is controlled human data establishing that the synthetic fragment produces meaningful repair benefits at the doses used, over what timescale, or with what long-term profile. That gap is the same one described for BPC-157, and pairing the two — as is common — does not close it for either.

Why it is paired with BPC-157

The reasoning is that they act through different repair pathways: TB-500 on cell migration and actin regulation, BPC-157 on angiogenesis and growth-factor signalling. Combining complementary mechanisms is sound in principle. In practice both rest on animal data, so the combination inherits the same caveat rather than resolving it.

Where the interest comes from

Thymosin beta-4 is one of the more abundant proteins in many tissue types and is upregulated at wound sites, which is a reasonable starting point for interest in it as a repair agent. The synthetic fragment used here reproduces the active region rather than the whole protein.

The gap between that plausible starting point and demonstrated human benefit is where the honest assessment sits. It is not that the mechanism is implausible — it is that nobody has run the trials that would establish dose, timescale or safety profile in people.

Testing status

TB-500 is prohibited at all times under anti-doping codes and is detectable. Anyone competing under WADA or UKAD rules should treat it as disqualifying — see the wider position in are peptides legal in the UK.

What to expect realistically

Anecdotal reports describe improvement over weeks rather than days, generally in soft-tissue recovery rather than anything acute. Given the absence of controlled human data, those reports are the entire basis for any expectation — which is worth holding in mind against the confident timelines that circulate.

Handling

Lyophilised, reconstituted with bacteriostatic water, refrigerated afterwards and degrading over weeks. Concentration depends on the water added rather than on the vial. Ultima Pharmaceuticals and Pharmaqo Labs carry the stocked lines, alongside the broader peptides range.

Not a controlled drug but an unlicensed medicine — supply for human use is an offence, possession generally is not. See are peptides legal in the UK.

Ultima Pharmaceuticals and Pharmaqo Labs price the stocked lines between £40 and £348, a spread driven by presentation size rather than any difference in the compound itself.

Frequently asked questions

What does TB-500 do?
Thymosin beta-4 is involved in cell migration and tissue repair. The synthetic fragment is used on that basis, with the evidence largely from animal models.

Is TB-500 the same as thymosin beta-4?
It is a synthetic fragment of it rather than the complete protein.

Should TB-500 be run with BPC-157?
They are commonly paired on the reasoning that the mechanisms are complementary. Both carry the same evidential limitation.

Is TB-500 banned in sport?
Yes, it is prohibited at all times under anti-doping codes.

How long does a vial last once mixed?
Weeks refrigerated, considerably less at room temperature. Mix only what will be used.