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TB-500

Thymosin Beta-4 fragment

Not ARTG-approved

What it is

A synthetic fragment of the Thymosin Beta-4 protein, commonly discussed alongside BPC-157 in recovery contexts.

What the evidence shows

Interest is driven largely by pre-clinical and animal work on tissue repair. High-quality human trials supporting the recovery claims are lacking.

Safety & reported risks

As an unapproved injectable, the practical risks are product quality and sterility, unknown dosing, and the absence of medical oversight. It is also prohibited in sport under the World Anti-Doping Code.

Status in Australia

Not ARTG-approved. Typically sold as an unapproved "research" product, which is not lawful for human use.

How it’s lawfully accessed

No general lawful pathway for human use in Australia. It is not registered and is commonly supplied through unregulated channels that fall outside Australian law.

Related peptides

BPC-157Body Protection CompoundNot ARTG-approvedThymosin Alpha-1Immune-modulating peptideCompounded use

Frequently asked questions

Is TB-500 banned in sport?

Yes. Thymosin Beta-4 and its fragments are prohibited at all times under the World Anti-Doping Code, which is separate from TGA regulation.

Sources & further reading

This entry is general information about TB-500, not a recommendation to use it. We don’t provide dosing, protocols or sourcing. Speak to a registered practitioner.

Written by The Peptides.au editorial team
Editorial review Checked against current TGA, ARTG and AHPRA public guidance
Last updated 1 June 2026

This is general education, not medical advice. Peptides.au does not sell, supply, recommend or promote any product or clinic. Always speak with a registered Australian health practitioner before making any health decision.