TB-500
Also known as Thymosin Beta-4 fragment, TB4 frag
TB-500 is a synthetic peptide corresponding to a short active region of Thymosin Beta-4, a protein present in most human cells and in wound fluid. It is not the whole protein: it is a fragment of seven amino acids, which is why the two names are not interchangeable despite often being used as if they were.
Who has TB-500 in stock
| Supplier | Listing | Price | Per mg | |
|---|---|---|---|---|
| XL PeptidesBest valueUK | TB-500 5mg Research Peptide | £18.99 | £3.80 | In stock, go |
| Baltic PeptidesEU and UK | TB-500 (TB4) 10mg | €54.99 | €5.50 | In stock, go |
| Peptides UKUK | TB500 5mg | £29.95 | £5.99 | In stock, go |
| Peptides UKUK | TB500 2mg | £14.95 | £7.48 | In stock, go |
| XL PeptidesUK | Wolverine Peptide Stack | BPC-157 + TB-500 | 2 Vials | £29.99 | – | In stock, go |
| HiPeptidesUK | TB500 Theymalin Beta-4 | £39.99 | – | In stock, go |
| HiPeptidesUK | BPC-157 + TB-500 Nasal Spray | £39.99 | – | In stock, go |
| HiPeptidesUK | TB-500 | £39.99 | – | In stock, go |
| AminoPeptidesUK | BPC-157 5mg & TB-500 5mg | Peptide Bundle | £44.00 | – | In stock, go |
| HiPeptidesUK | BPC-157 + TB-500 Blend | £44.99 | – | In stock, go |
| True PeptidesInternational | TB-500 | US$55.00 | – | In stock, go |
| Baltic PeptidesEU and UK | BPC-157 / TB-500 Blend (5/5mg, 10/10mg) | €59.99 | – | In stock, go |
| AminoPeptidesUK | GLOW BLEND (GHK-Cu, BPC-157, TB500) | 70mg | £65.00 | – | In stock, go |
| PEAK_PEPTIDEInternational | BPC-157 + TB-500 Blend | €67.90 | – | In stock, go |
| PEAK_PEPTIDEInternational | TB-500 | €69.90 | – | In stock, go |
| AminoPeptidesUK | BPC-157 & TB-500 Peptide Bundle | 10mg & 10mg | £78.00 | – | In stock, go |
| Baltic PeptidesEU and UK | GLOW 70mg (GHK-Cu + BPC-157 + TB-500) | €79.99 | – | In stock, go |
| AminoPeptidesUK | KLOW BLEND (GHK-Cu, BPC-157, TB500, KPV) | 80mg | £80.00 | – | In stock, go |
| AminoPeptidesUK | BPC-157 10mg, TB-500 10mg & GHK-Cu 50mg | Glow Peptide Bundle | £99.00 | – | In stock, go |
| True PeptidesInternational | BPC-157 + TB-500 Blend | US$110.00 | – | In stock, go |
Live stock is checked hourly at 10 suppliers. A further 7 vetted suppliers have no live feed yet, so we never show them as in stock. We earn a commission from some supplier links when you buy. It costs you nothing extra and never changes the order, which is by price per mg.
What it has been studied for
- Cell migration and actin regulation in laboratory studies
- Wound closure rates in animal models
- Cardiac tissue following induced injury in mice
- Corneal healing in animal studies
Evidence level: Animal studies only. Results in animals or cells often fail to carry over to people.
What happened in human trials
The full protein, thymosin beta-4, was tested in small trials for wounds and dry eye with mild side effects. The product sold as TB-500 has never been trialled in people.
Prohibited in drug-tested sport under the World Anti-Doping Code.
UK legal status
Not licensed as a medicine in the UK. Prohibited in sport at all times under WADA class S2 (peptide hormones, growth factors and related substances).
Handling
Lyophilised powder, reconstituted with bacteriostatic water. Larger vial sizes are common, which often means a larger water volume and therefore a higher click count on a dosing pen. Commonly 2mg, 5mg or 10mg per vial.
Questions
Is TB-500 the same as Thymosin Beta-4?
No. Thymosin Beta-4 is a 43-amino-acid protein occurring naturally in the body. TB-500 is a synthetic seven-amino-acid fragment of it. They are frequently conflated online and in supplier listings, but they are different molecules.
What is the state of the human evidence?
Thin. The bulk of published work is preclinical, in cell cultures and animal models. Thymosin Beta-4 itself has been through some early human trials for specific indications; the TB-500 fragment has far less behind it.
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