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Longevity · Compound

Thymosin Alpha-1

A 28-amino-acid peptide fragment of prothymosin alpha that occurs naturally in the thymus; its synthetic form is called thymalfasin.

Philippines Peptides editorial deskUpdated Trial data checked 23 September 20264 min read

Thymosin Alpha-1 is not yet in the evidence datasets this site draws on, so this page makes no claim about what it does.

What is Thymosin Alpha-1

Thymosin alpha-1, often abbreviated TA-1, is a 28-amino-acid peptide, a fragment of prothymosin alpha, that occurs naturally in the thymus. Its synthetic form is called thymalfasin. It was first sequenced in 1977 by Allan Goldstein at George Washington University. Browse the full peptide library for related compounds.

Thymosin alpha-1 is not in the evidence, benefits or regulatory datasets this site draws on, and this page cites no primary source for it. For that reason it makes no claim here about what it does in people, its clinical uses, or its approval status in any country.

Despite the shared name, it is a different molecule from TB-500, which is related to thymosin beta-4.

How it works

No mechanism is described here. This page cites no primary source for how thymosin alpha-1 acts, and it is not in the evidence datasets, so a mechanism statement could not be tied to a study and its evidence level.

Benefits studied

Thymosin Alpha-1 is not yet in the evidence datasets this site draws on, so this page makes no claim about what it does. Anything published about it elsewhere should be read with its evidence level in mind: most peptides in this category have animal or cell data only.

Side effects reported

No controlled human data on adverse events for Thymosin Alpha-1 is in the datasets this site draws on, so its safety in people is unknown rather than established. Effects commonly described for it are listed below; how often they occur has not been measured in a controlled trial.

  • Injection site reaction (redness, minor swelling)
  • Fatigue
  • Headache
  • Temporary rise in ALT liver enzymes
  • Flu-like symptoms

Regulatory status

The regulatory dataset this site draws on has no row for Thymosin Alpha-1.

Who should not use Thymosin Alpha-1

Everything above is research framing. If you have got as far as wanting a vial, the catalogue at Primara Labs, our partner and supplier, is the shortest way to see what is held inside the Philippines and at what price. View the Primara Labs catalogue

FAQ

Is Thymosin Alpha-1 legal in the Philippines?

Thymosin alpha-1 is not in the regulatory dataset this site draws on, so this page states no registration status for it, in the Philippines or elsewhere. The regulatory status page shows the status of the compounds that dataset covers.

How is TA-1 different from TB-500?

They are different peptides despite both carrying the thymosin name. Thymosin alpha-1 is a 28-amino-acid fragment of prothymosin alpha. TB-500 is identified in the analytical literature as a fragment of thymosin beta-4, and its evidence in this site's datasets is animal and cell studies only.

What evidence exists for Thymosin Alpha-1?

Thymosin alpha-1 is not in the evidence datasets this site draws on, and this page cites no primary source for it, so it states no evidence level and no finding.

Where to get Thymosin Alpha-1 in the Philippines

Primara Labs, our partner and supplier, lists their current vials on the catalogue. Prices and stock change, so check there for what is available now. View the Primara Labs catalogue

The supply index covers what to ask a seller before paying, and why quoted prices vary so widely.

View Supply Index

Risk · Disclosure · Editorial Status

This page is editorial information for adults researching peptide therapy. It is not medical advice, not a prescription, and not an endorsement of any specific product, supplier, or protocol. Side effects can be serious and individual response varies. Talk to a licensed physician (ideally one with peptide-specific clinical experience) before starting any compound, adjusting a dose, or discontinuing therapy.

In the Philippines, GLP-1 medications are prescription-only under FDA Philippines regulation. Research-grade peptides occupy a regulatory gray area: import for personal research use is generally tolerated, but the Bureau of Customs reserves the right to inspect and detain shipments. Do not import for resale.

Editorial Status
Non-clinical
Affiliation
Not a clinic · Not a pharmacy
Last Updated
September 24, 2026

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