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TB-500: molecular data, studies & sources

TB-500 is used inconsistently in commercial naming. The selected analytical paper describes an acetylated active-region fragment of thymosin beta-4 and its detection in horse samples. Full-length thymosin beta-4 studies should not be transferred to an unspecified TB-500 product.

Overview sources: PMID 23084823

Compiled by PeptideTech Editors · Sources checked · Selected bibliography, not a systematic review

Molecular formula, weight & structure

Molecular record not yet resolved

TB-500 is an ambiguous supplier label used for a fragment and for full-length thymosin beta-4. No single molecular formula or structure is assigned without an exact sequence.

MF: not assigned · MW: not assigned · Structure: not assigned

Human and clinical studies

Selected human-study records are shown with their indexed or reviewed study type. Check the original article for the intervention, formulation and controls; the molecule can also be a comparator or measured variable.

No matching human study was retained in this selected bibliography. This is a documented evidence gap in our selection, not proof that no study exists.

    Preclinical research, reviews & other publications

    Animal studies, laboratory experiments, reviews and other indexed papers answer different questions. A review is secondary evidence; a case report does not estimate how often an outcome occurs.

    1. Preclinical / laboratory research

      Doping control analysis of TB-500, a synthetic version of an active region of thymosin β₄, in equine urine and plasma by liquid chromatography-mass spectrometry.

      Ho EN, Kwok WH, Lau MY et al. · Journal of chromatography. A · 2012

      Analytical detection of an acetylated thymosin beta-4 fragment in horse urine and plasma. This is not a human treatment trial.

      PMID 23084823 · DOI: 10.1016/j.chroma.2012.09.043

    TB-500 supplier sources

    Scientific sources describe molecules and experiments. The commercial links below identify recorded supplier packages. A publication or chemical database entry does not verify the seller, purity, sterility or contents of a lot. Some links are affiliate links; see our disclosure.

    Compare all TB-500 sizes, forms and supplier prices →

    SupplierRecorded packagesExample source listing
    Blank PeptidesUSD10mg Vial1 recorded offers10mg Vial · $60.00Checked Sep 21, 2026Supplier listing
    Modified AminosUSD10mg Vial1 recorded offers10mg Vial · $39.99Checked Sep 16, 2026Supplier listing
    Amino ClubUSD10mg Vial1 recorded offers10mg Vial · $39.99Checked Sep 16, 2026Supplier listing
    Nova Peptide SupplyUSD5mg Vial · 10mg Vial2 recorded offers5mg Vial · $34.99Checked Sep 16, 2026Supplier listing
    Cenexa LabsUSD10mg Vial · 5mg Vial2 recorded offers10mg Vial · $84.99Checked Sep 16, 2026Supplier listing
    US Peptide LabsUSD10mg Vial1 recorded offers10mg Vial · $80.00Checked Sep 16, 2026Supplier listing
    Direct PeptidesUSD10mg Vial1 recorded offers10mg Vial · $99.00Checked Sep 16, 2026Supplier listing
    Particle PeptidesEUR10mg Vial1 recorded offers10mg Vial · €79.99Checked Sep 16, 2026Supplier listing

    Reference sources & further reading

      The citations above link directly to publication records. Encyclopedia links are background reading and are not used to establish clinical effectiveness.

      Search for additional research

      These links run searches; their results have not been individually reviewed and can include unrelated compounds.

      Research information is not a dosing guide or a recommendation for personal use. Study findings are specific to the formulation, population and methods tested. Read our source and correction policy.

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