Thymosin Alpha-1 5mg
For Research Use Only
≥98%
HPLC Verified
COA
Every Batch
USA
Jessup, PA
Immune & Cognitive / Thymic Peptides

Thymosin Alpha-1 5mg

Research Grade

The clinically approved thymic immunomodulator — approved in 35+ countries as Zadaxin for hepatitis and immune restoration, activating TLR9 and driving Th1 antiviral immunity.

≥98% Purity COA Included Cold Pack Shipping Same-Day Ship
$75.00
4.4 · 5 reviews
1

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$67.50
$75.00
Purity
≥98%
Weight
5mg
CAS
62304-98-7
Formula
C129H215N33O55
Form
Sterile Lyophilized Powder
Vial
3 mL Multi-Dose Vial

Product Overview

Thymosin Alpha-1 (Tα1, Thymalfasin) is a 28-amino-acid naturally occurring peptide derived from prothymosin alpha, first isolated by Dr. Allan Goldstein at George Washington University in 1972. It is the most bioactive component of thymosin fraction 5, the crude thymic extract that initiated decades of immunomodulatory research. Tα1 is approved as a pharmaceutical agent in over 35 countries (marketed as Zadaxin by SciClone Pharmaceuticals) for the treatment of hepatitis B, hepatitis C, and as an immune adjuvant in cancer therapy. This clinical validation, backed by over 40 years of research, makes Thymosin Alpha-1 one of the most rigorously characterized immunomodulatory peptides available for research.

Methodology Note: This product summary references published preclinical and clinical research. 22EXO does not make therapeutic claims. All compounds are sold strictly for laboratory and research applications.

Disclaimer: This product is sold for research and laboratory use only. Not for human consumption. By purchasing, you agree to our terms of service and confirm that this product will only be used for legitimate research purposes.

Customer Reviews

4.4 · 5 reviews
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Reference-grade thymic peptide
by Dr. W. Chang · 2026-05-01 · ✓ Verified
★★★★★

Batch consistency is excellent.

Consistent for immune-cognition work
by Dr. K. Shaw · 2026-05-01 · ✓ Verified
★★★★★

Used in a series of T-cell maturation experiments. Activity has been consistent across the two lots we've ordered.

TA1 quality is up there
by Vince R · 2026-05-01 · ✓ Verified
★★★★★

thymosin alpha 1 is studied in immune research. 22EXO's product is clean and well-documented. coa is detailed.

wrong tracking number sent
by anon-r · 2026-04-14
★★☆☆☆

tracking number in the email pointed to a totally different shipment. the actual package arrived fine. fix the system.

Reference-grade thymic peptide
by Dr. W. Chang · 2026-02-10 · ✓ Verified
★★★★★

We use this for our immune modulation studies. Acetylation at the N-terminus is confirmed. Batch consistency is excellent.

Resources

For research use only. Not for human consumption. Not approved by the FDA for any therapeutic indication. By purchasing, you confirm that this material will be used solely for in-vitro research purposes by qualified researchers.