Peptide
Thymosin Alpha-1
TA-1, Zadaxin
Research ChemicalClinical TrialsInjection (SubQ)
Half-life
~2 hours
Common dose
1.5mg twice per week
How it works
28-amino acid peptide naturally secreted by the thymus. Modulates T-cell differentiation and activation, enhances NK cell activity, and regulates cytokine production for balanced immune response.
Commonly used for
Immune functionAnti-agingInfection recoveryLongevity
Potential benefits
- FDA approved in some countries for hepatitis B and C
- Strong immune modulation — useful after illness or surgery
- Anti-tumor properties in combination therapies
- Low side effect profile even at therapeutic doses
- Studied in COVID-19 patients with positive outcomes
Risks and downsides
- Expensive — among the priciest peptides per mg
- Injection only
- Not FDA approved in the US
- Most benefit seen in immunocompromised individuals
- Hard to objectively measure immune improvements
Heads up: This is for educational purposes only and is not medical advice. Many compounds here are not FDA approved for human use. Please talk to a doctor before starting anything.
Risk level
Evidence
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