Thymosin Alpha-1 (also known as Tα1, Zadaxin) is an immune-modulating peptide used clinically in several countries. This page covers what the published research does — and does not — establish about it in relation to immune function and resilience.
Thymosin Alpha-1 is researched for Immune modulation, Infection support — which is why it appears in discussions of immune function and resilience.
Research status: Human clinical use in several countries; ongoing research.
How Thymosin Alpha-1 is thought to work
Thymosin Alpha-1 is a naturally occurring peptide that helps regulate the immune system, particularly T-cell function. It is used clinically in a number of countries as an immune modulator, including as an adjunct in certain infections and cancers.
What it does not establish
Regulatory status varies by country. Should be used under medical supervision.
Nothing on this page is a recommendation to use Thymosin Alpha-1, and Selpho publishes no dosing, reconstitution or sourcing information. Read how we decide what goes in the library.
Other peptides researched for Immune Support
The human cathelicidin antimicrobial peptide studied for immune defense.
A short tripeptide fragment of α-MSH studied for anti-inflammatory effects.
Frequently asked questions
Human clinical use in several countries; ongoing research. Research relevant to this area covers immune modulation, infection support. That is a description of where the research points, not evidence that it will work for you — and Selpho does not provide dosing or medical advice.
Human clinical use in several countries; ongoing research.
Regulatory status varies by country. Should be used under medical supervision. Always speak to a licensed healthcare professional before considering any peptide.
Immune modulation — supporting immune response in certain infections, as a vaccine adjuvant in research, and as an adjunct therapy in some countries.
It is approved or used clinically in several countries, though regulatory status varies. It should be used under medical supervision.
Is Thymosin Alpha-1 right for your situation?
Describe your goals and the free Peptide Advisor will match them against the research — no signup, no sales pitch.
Ask the Advisor — freeThis page is for educational purposes only and is not medical advice, a diagnosis, or a recommendation to use any compound. It contains no dosing or purchase information. Always consult a licensed healthcare professional before considering any peptide.