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Thymosin Alpha-1

Also: TA-1 · Zadaxin

Immune modulator — used clinically for chronic viral infections and immune support.

Evidence
established
Legal status
approved some regions
Half-life
~2 hours
Routes
subq
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What it is

Thymosin Alpha-1 is approved in dozens of countries for chronic hepatitis B and adjunct cancer therapy. It modulates rather than stimulates the immune system, making it useful in both deficient and overactive immune states.

Mechanism

28-amino-acid peptide that modulates T-cell maturation and immune balance.

Outcomes it's matched to
Safety

Very well tolerated. Mild injection-site reactions most common.

  • Immunosuppressed transplant patients
Legal context

Approved in 30+ countries; not FDA-approved in the US.

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