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Research / Unapproved

TB-500: Research Status, Identity, and Clinical Trial Data

Molecular formulaC38H68N10O14
Molecular weight889 g/mol
Registered trials1
PubChem CID62707662

What TB-500 Is

TB-500 has no FDA-approved label and is not an approved drug. It is studied as an unapproved research compound, corresponding to a fragment of thymosin beta 4 (residues 17 to 23). Its molecular formula is C38H68N10O14, with a molecular weight of approximately 889 (PubChem CID 62707662). No pharmacology, mechanism, or approved indication has been established through an approved label.

Clinical Trial Footprint

One registered clinical trial involving TB-500 currently appears in the available data. That study, NCT07487363, is examining TB-500 (described as the thymosin beta 4 17-23 fragment) in relation to cardiovascular biomarkers in people with stable atherosclerotic cardiovascular disease. It is listed as recruiting, spanning an early combined trial stage. No outcome data, efficacy findings, or safety conclusions can be drawn from a trial that is still recruiting.

FAQ

Is TB-500 FDA approved?
No. TB-500 has no FDA-approved label and is not an approved drug for any use. It is currently studied only in a research context.
What is TB-500 chemically?
TB-500 refers to a fragment of thymosin beta 4, specifically residues 17 to 23. It has the molecular formula C38H68N10O14 and a molecular weight of approximately 889.
Are there clinical trials studying TB-500?
One registered clinical trial currently involves TB-500. It is examining cardiovascular biomarkers in people with stable atherosclerotic cardiovascular disease and is listed as recruiting.
What can the current trial tell us about TB-500's effects?
Very little at this stage. The single identified trial is still recruiting, so no results, efficacy data, or safety conclusions are yet available.
Is there safety data available for TB-500?
No adverse event report data was available in the reviewed dataset for TB-500. This reflects a lack of available reporting rather than a confirmed safety profile.
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Sources: PubChem CID 62707662 ClinicalTrials.gov NCT07487363

Updated 2026-09-19