Thymosin Alpha-1 Peptide Vials
N-acetylated 28-residue peptide · 5mg–10mg · boxes of 10 vials
Free delivery worldwide on orders over $1,000 (about £749)
Strength 2 options · price per box
Latest third-party test: 99.39%Purity (HPLC) · 5 mg · tested 28 Aug 2026
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- No minimumBoxes of 10 vials
- Tracked shippingDispatched in 1–2 working days
- Batch COAFree on request
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Often ordered together
One box of each. Change strengths or quantities in the cart.
About Thymosin Alpha-1
What is Thymosin Alpha-1?
Overview
What is Thymosin Alpha-1?
Thymosin Alpha-1 is a 28-residue N-acetylated peptide originally isolated from thymic tissue, where it forms part of the thymosin fraction 5 preparation. It is supplied as a lyophilised powder in sealed vials, boxed in tens, for laboratory research use only.
Thymosin Alpha-1 at a glance
| Compound | Thymosin Alpha-1 |
|---|---|
| Also known as | Thymalfasin, Talpha1, Ta1, Thymosin a1 |
| Classification | N-acetylated 28-residue peptide |
| CAS number | 62304-98-7 |
| Molecular formula | C129H215N33O55 |
| Molecular weight | 3108.3 g/mol |
| Sequence | 28-residue N-acetylated sequence, Ac-SDAAVDTSSEITTKDLKEKKEVVEEAEN |
| PubChem CID | 16130571 |
| Purity | 99%+ by HPLC |
| Physical form | Lyophilised powder |
| Available strengths | 5 mg, 10 mg |
| Box quantity | 10 vials |
| Price from | $10.00 per vial ($100.00 per box) |
| Research status | An approved medicine in over 30 countries under the name thymalfasin. Not approved in the UK or US. |
| Documentation | Batch-specific third-party COA |
These are catalogue target specifications, not batch results. The 99%+ purity figure is the specification we buy to. The authoritative figures for any particular box are the ones printed on that box’s Certificate of Analysis, which is lot-specific. What research grade actually means explains the difference. Terms such as HPLC purity and net peptide content are explained in the peptide glossary.
We make no “third-party verified” claim for a batch unless the matching report is supplied with it. Ask for the current COA for the lot in stock before you order — we will send it.
Prices for every strength
Pricing
Thymosin Alpha-1 price per vial: 5mg and 10mg
Thymosin Alpha-1 starts at $10.00 per vial (£7.49), sold in boxes of 10 at $100.00. One box is the smallest order and there is no trade account or minimum spend. Larger volumes are negotiable.
| Strength | Per vial | Box of 10 |
|---|---|---|
| 5 mg | $10.00 £7.49 | $100.00 £74.92 |
| 10 mg | $15.57 £11.67 | $155.71 £116.66 |
Storage & reconstitution
Handling
How should Thymosin Alpha-1 be stored and reconstituted?
Sealed vials tolerate ambient temperature in transit and keep at −20 °C beyond that. Reconstitute slowly down the vial wall, swirl rather than shake, then refrigerate at 2–8 °C and aliquot before freezing.
Why each of those matters, and what a freeze–thaw cycle actually costs: peptide handling and storage reference. How long a mixed vial keeps: reconstituted peptide shelf life.
What it is researched for
Research Context
What is Thymosin Alpha-1 researched for?
Below is a plain-English summary of what published research has investigated, and what it has found. These are descriptions of research activity and published results. They are not claims about what Thymosin Alpha-1 does, and nothing here is a statement that it is safe or effective for any purpose.
Toll-like receptor signalling
Thymosin Alpha-1 acts on TLR2 and TLR9 on immune cells, influencing how strongly those cells respond to pathogen-associated signals. This is the best-characterised part of its mechanism.
T-cell maturation
It was originally isolated from thymic tissue, the organ where T-cells mature, and research examines its influence on that maturation process and on the balance of T-cell subsets.
Clinical use elsewhere
Where approved, it is used alongside other treatments in hepatitis B and C and as a vaccine adjuvant, and it was studied during the COVID-19 pandemic. The most rigorous evidence sits in sepsis: a multicentre randomised controlled trial, 1 and a 2025 meta-analysis pooling eleven randomised trials across 1,927 patients. That meta-analysis found reduced 28-day mortality overall but no significant benefit within its high-quality or multicentre subgroups, and concluded the accumulated sample size is still inadequate. 2 The clinical record is unusually substantial for a peptide in this category, and unusually equivocal.
References
- 1The efficacy of thymosin alpha 1 for severe sepsis (ETASS): a multicenter, single-blind, randomized and controlled trial. Crit Care (2013). PMC4056079
- 2Efficacy of thymosin alpha 1 for sepsis: a systematic review and meta-analysis of randomized controlled trials. Front Cell Infect Microbiol (2025). PMID 40969554
Links open the record on PubMed or PubMed Central. These are citations to published research, not claims about this product.
Laboratory uses
Applications
Where Thymosin Alpha-1 is used in the laboratory
- Toll-like receptor signalling studies in immune cell culture
- T-cell maturation and differentiation research
- Comparative studies within the thymosin peptide family
- Analytical characterisation of N-acetylated peptides
Batch COA
Verification
Does Thymosin Alpha-1 come with a COA?
Yes — every box. Each batch of Thymosin Alpha-1 is analysed by an independent third-party laboratory, and the certificate is tied to the batch number on the vial label.
Example COA. You receive the certificate matching your own batch.
Questions & answers
Questions
Thymosin Alpha-1 questions, answered
How is Thymosin Alpha-1 different from Thymosin Beta-4?
They share a name but little else. Thymosin Alpha-1 is a 28-residue N-acetylated peptide studied in immune signalling. Thymosin Beta-4 is a 43-residue actin-binding peptide studied in cytoskeletal dynamics and cell migration. Both were first isolated from the same thymic extract, which is the only real reason they share a family name.
How much does Thymosin Alpha-1 cost?
Thymosin Alpha-1 starts at $10.00 per vial, sold in boxes of 10 vials at $100.00 per box (about £74.92). 2 strengths available: 5 mg, 10 mg. There is no minimum order.
Can I buy Thymosin Alpha-1 10mg vials in the UK?
Yes. Thymosin Alpha-1 10mg comes in boxes of 10 vials at $155.71 per box ($15.57 per vial, about £116.66 per box), sent tracked to UK addresses. There is no minimum order.
How is Thymosin Alpha-1 shipped to the UK and USA?
Tracked to the UK, USA, EU and worldwide, in plain packaging, dispatched within 1–2 working days. Country-by-country estimates are on the shipping page.
