Peptide Encyclopaedia
Thymosin alpha-1
Also known as Thymalfasin, Zadaxin.
Approved-medicine listing only. This is not available from the Cellular Sequence shop. Licensed products require a prescriber and an ARTG-registered presentation.
At-a-glance profile
- Classification
- Immunomodulatory peptide (registered in some countries, not a wellness SKU here)
- Approval status
- Approved medicine
- Research status
- Labelled indications are defined in product information.
- Molecular formula
- Insufficient reliable evidence identified.
- Molecular weight
- Insufficient reliable evidence identified.
- Sequence
- 28-amino-acid N-acetylated peptide from prothymosin α.
- Primary biological target
- Insufficient reliable evidence identified.
- Half-life
- Insufficient reliable evidence identified.
- Routes investigated
- Insufficient reliable evidence identified.
- Human evidence level
- A — Approved clinical use / strong human evidence
What is it?
A peptide medicine in some jurisdictions for specific indications. Grey-market TA1 vials are not those products. Not sold here.
Mechanism of action
T-cell and innate-immune signalling hypotheses.
Immunomodulatory — not a gym supplement.
What is it being studied for?
- Labelled infectious/immune indications where registered
Investigational findings are not proven clinical benefits unless an authority has labelled that indication.
Evidence level
Overall human evidence grade: A · Approved clinical use / strong human evidence
Human research
Registered in some countries; not a licence for unapproved compounding.
Preclinical research
Animal, cell and in-vitro findings are listed separately from human effects.
Thymic peptide literature.
Doses reported in published research
This section does not provide personalised medical dosing. Values are those reported in papers or protocols. Animal mg/kg doses are not converted to human doses.
Doses reported in human studies
Insufficient reliable evidence identified.
Preclinical / animal study dosing
Insufficient reliable evidence identified.
Pharmacokinetics
Reliable human pharmacokinetic data were not identified for this encyclopaedia entry, or are limited to product information for approved presentations.
Safety
As per labelled product; unregulated vials unsafe.
Unknowns. Absence of a published harm signal is not evidence of safety.
Contraindications. Not for self-injection.
Regulatory status
Approved in some markets (e.g. thymalfasin) for specified uses.
Not a Cellular Sequence shop product. Check ARTG.
Citations
[1] Encyclopaedia note
Encyclopaedia note
For educational and research reference only. This page summarises published scientific literature and does not constitute medical advice, prescribing information or a recommendation to use an investigational compound. Research doses shown describe doses reported in published studies and are not personalised dosing instructions.
Last reviewed 2026-09-13. Research areas: Recovery · Compare peptides