Thymosin Alpha-1

well-studied
Tα1ZadaxinThymalfasin

A thymic peptide that modulates immune function, enhancing T-cell activity and used clinically for hepatitis B and immunodeficiency.

Category
immune
Dosage
1.6 mg daily or twice weekly
Half-Life
Approximately 2 hours
Administration
Subcutaneous injection

Overview

Thymosin Alpha-1 (Tα1) is a 28-amino acid peptide naturally produced by the thymus gland. It plays a critical role in immune system maturation and regulation by promoting T-cell differentiation and enhancing dendritic cell function. It was first isolated by Allan Goldstein in the 1970s.

Approved in over 35 countries (marketed as Zadaxin) for treatment of hepatitis B and C, it has also shown efficacy as an adjunct therapy for cancer immunotherapy and vaccine enhancement. During the COVID-19 pandemic, it gained attention for its potential to modulate hyperinflammatory immune responses. It is one of the most clinically validated immune-modulating peptides.

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Benefits

  • Enhances T-cell maturation and function
  • Boosts innate and adaptive immunity
  • Clinically proven for chronic hepatitis B
  • Adjunct therapy for certain cancers
  • May improve vaccine efficacy
  • Modulates overactive immune responses

Side Effects

  • Generally very well-tolerated
  • Injection site reactions
  • Rare mild fever
  • Muscle aches (uncommon)
  • No significant immunosuppressive effects

Where to Source Thymosin Alpha-1

Quality and purity matter with peptides. Only buy from suppliers that provide third-party Certificate of Analysis (COA) testing. Compare verified sources below:

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Quick Comparison Guide

Quality
COA + 3rd party testing required
Purity
≥95% minimum standard
Storage
Lyophilized powder preferred
Shipping
Cold chain when needed

🔍 Buying Tips for Thymosin Alpha-1

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  • • Verify the supplier's testing methodology and third-party lab credentials
  • • Look for proper cold storage and shipping practices
  • • Start with smaller quantities to test supplier quality
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⚠ Research Disclaimer: This information is for educational purposes only and is not medical advice. Consult a qualified healthcare professional before using Thymosin Alpha-1 or any peptide. See our full medical disclaimer.

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