Compound hub
TB-500
TB-500 is a synthetic seven-amino-acid fragment of the natural protein thymosin beta-4, defined in two 2012 papers as Ac-LKKTETQ. This hub answers the questions people ask about it from regulator records and published studies, and it says plainly where no human study exists.
Record card
| Common name | TB-500 |
|---|---|
| Sequence as defined in two 2012 papers | Ac-LKKTETQ, 7 amino acids, positions 17–23 of thymosin beta-4 |
| Parent protein | Thymosin beta-4, 43 amino acids |
| CAS number, free base (FDA briefing) | 885340-08-9 |
| Human studies found by the FDA, July 2026 | None |
| Poisons Standard, October 2026 | Named in Schedule 4 and Appendix D, clause 5 |
| WADA 2026 Prohibited List | S2.3, prohibited at all times |
Questions answered here
06- Is TB-500 legal in Australia? Poisons Standard, TGA, WADA and FDA statusWhat the official records say about TB-500 in Australia as of 14 October 2026: Poisons Standard entries, TGA statements, the WADA 2026 list and FDA documents. A report of records, not legal advice.Updated 2026-10-14
- Thymosin beta-4 vs TB-500 vs GHK-Cu: how do they compare?Thymosin beta-4, TB-500 and GHK-Cu are three different molecules. A cited comparison of their properties and records, plus what named studies found on men, knee pain, the heart and measurement timing.Updated 2026-10-14
- TB-500 half-life: what do the studies show?What the FDA briefing document and published studies report about TB-500 in the body: horse, rat and laboratory findings, and when studies measured any effect. Research material is not a medicine.Updated 2026-10-14
- TB-500 side effects: what do the safety records show?TB-500 side effects: what the FDA's May 2026 briefing document, a trial registry record and human trials of thymosin beta-4 recorded. A report of documents and studies, not advice. Research material is not a medicine.Updated 2026-10-14
- What is TB-500? The thymosin beta-4 fragment explainedWhat TB-500 is, what else it is called, what papers report about its parent protein, and where the Poisons Standard and sport rules place it, as of 14 October 2026. Research material is not a medicine.Updated 2026-10-14
- What does TB-500 do? What published studies foundWhat the FDA's May 2026 briefing document and published studies report about TB-500 and its parent protein thymosin beta-4: laboratory, animal and human-trial findings, each with its limits. Research material is not a medicine.Updated 2026-10-14
Form Laboratories supplies research-use-only reference material. Everything in this hub is an educational summary of published third-party literature. It is not medical advice, not a use instruction, and research material is not for human or animal use.