Thymosin Alpha 1
A 28-amino acid synthetic peptide corresponding to the naturally occurring thymic hormone. Studied extensively for its role in T-cell maturation, dendritic cell activation, and innate immune modulation.
For laboratory and in vitro research purposes only. Not for human consumption.
What is Thymosin Alpha 1?
Thymosin Alpha-1 is a 28-amino acid peptide naturally occurring in the thymus gland that plays a role in immune system regulation. First isolated by researcher Allan Goldstein, it has since become one of the most clinically studied immunomodulatory peptides in existence. Researchers have examined its effects on T-cell maturation, dendritic cell activation, and innate immune responses. The pharmaceutical form, Thymalfasin, is approved in multiple countries for hepatitis B treatment and as a cancer therapy adjuvant — with over 100 clinical trials on record.
28 amino acids.
100+ clinical trials.
Thymosin Alpha-1 has one of the most extensive clinical research records of any peptide — over 100 clinical trials examining its role in hepatitis, cancer, sepsis, and immune decline. The pharmaceutical form is approved and in active clinical use in multiple countries.
How Thymosin Alpha-1 works in research models
Thymosin Alpha-1 is an endogenous peptide originally isolated from thymic tissue by Goldstein and colleagues. It acts through Toll-like receptor 9 (TLR9) and dendritic cell activation pathways, promoting T-cell differentiation and maturation — particularly of regulatory T cells (Tregs) and cytotoxic CD8+ T cells.
from the thymus.
studied for immune balance.
Thymosin Alpha-1 was originally isolated from thymic tissue and studied for its role in T-cell maturation. Research has documented activity across multiple immune axes — from dendritic cell activation to TLR9 signalling and regulatory T-cell modulation.
Thymosin alpha1: biology and therapeutic implications in hepatitis, cancer and HIV.
Expert Opin Biol Ther · 2009 · PMID: 19392576
Thymosin α1 activates complement receptor-mediated phagocytosis in human monocyte-derived dendritic cells.
J Clin Invest · 2012 · PMID: 23172334
Thymosin alpha1 and HIV: recent advances.
Ann N Y Acad Sci · 2012 · PMID: 22292059
Human clinical research has typically used 1.6 mg doses administered subcutaneously, with various dosing schedules depending on indication. Preclinical rodent studies use weight-adjusted doses of 100–500 mcg/kg. Reconstitute with bacteriostatic water and store at 4°C.
You ask, we answer.
No. They are separate peptides with distinct mechanisms. Thymosin Alpha-1 (from the alpha-thymosin family) is primarily an immune modulator. Thymosin Beta-4 (TB-500 is a fragment of it) is primarily involved in actin dynamics and tissue repair. Both originate from thymic tissue research but operate through entirely different pathways.
Thymalfasin (the pharmaceutical form of Thymosin Alpha-1) is approved in several countries for hepatitis B and as an adjuvant in cancer treatment. It has been the subject of over 100 clinical trials.
Thymalfasin is approved in over 35 countries for treatment of hepatitis B, as an adjuvant to chemotherapy, and for other immune-related indications. It has been used clinically for decades in Asia, Eastern Europe, and South America.
Immunosenescence refers to the gradual deterioration of the immune system with aging — characterized by reduced T-cell diversity, impaired vaccine responses, and increased susceptibility to infection. Research has examined Thymosin Alpha-1 as a tool for studying immune function in aged subjects, as it appears to promote T-cell maturation via thymic-independent pathways.
Research Use Only
All Rowan Peptides products are intended strictly for laboratory and in vitro research purposes. They are not approved by the FDA and are not intended for human consumption, veterinary use, or any therapeutic application. By purchasing, you agree to our Terms of Service and Indemnity Waiver. Rowan Peptides LLC operates as a chemical supplier only.
Thymosin Alpha 1 has a strong research base for immune function and T-cell studies. Rowan's 5mg vial came with a legit Janoshik COA showing 99.3% purity. This is a peptide where sourcing quality really matters and they deliver.
Post-illness immune research protocol. Added this to the stack. Vial was properly sealed, cake looked right, reconstituted cleanly. Already ordered a second.
Bought this alongside a few other compounds. Ta1 is one where purity matters most to me because of how sensitive the immune research is. Rowan hit the mark. The COA is the real thing.
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