Educational content only. Not medical advice. Consult a qualified physician.
Thymosin Alpha 1 peptide
ImmuneApproved in over 35 countries (brand name Zadaxin). Not FDA-approved in the United States, though it has been used under compassionate use and emergency authorizations.

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Thymosin Alpha 1

Thymosin Alpha 1 is a naturally occurring peptide first isolated from thymic tissue. The synthetic version (thymalfasin) is approved in over 35 countries for conditions including hepatitis B, hepatitis C, and as an immune adjuvant. It modulates the immune system by enhancing T-cell function, dendritic cell maturation, and antibody responses.
Reported Benefits

Potential Benefits

  • Approved in multiple countries for hepatitis B and C treatment
  • Research supports enhancement of T-cell maturation and function
  • Studies indicate potential as a vaccine adjuvant to improve immune responses
  • May support immune function in immunocompromised individuals
  • Clinical data suggests potential benefits in combination with cancer immunotherapy
  • Research indicates modulation of toll-like receptors and dendritic cell function
Research Dosing

Recommended Starting Dose

1.6 mg subcutaneously (standard clinical dose in approved markets)

Based on published research protocols. Not a prescription.

Dosing Protocol

Standard clinical dosing in approved markets is 1.6 mg subcutaneously twice weekly. For hepatitis, treatment courses typically last 6-12 months. As an immune adjuvant, shorter courses may be used. Some protocols use daily dosing for acute immune challenges.

DOSING INFORMATION DISCLAIMER: Any dosing information, protocols, or ranges discussed on this site are drawn from published research studies and clinical literature. They are presented for educational reference only and must not be used as self-medication guidance.

Research Timeline

Expected Timeline

Phase 1

Immune biomarker changes may be measurable within 2-4 weeks. Clinical benefits for hepatitis and immune support typically develop over weeks to months of consistent use.

Regulatory

Research Status

Approved in over 35 countries (brand name Zadaxin). Not FDA-approved in the United States, though it has been used under compassionate use and emergency authorizations.

The regulatory status of peptides can change at any time. Verify current FDA classification and legal status in your jurisdiction before seeking medical consultation about this compound.

Safety Profile

Potential Side Effects

  • Generally well-tolerated in clinical studies
  • Injection site reactions (mild pain, redness)
  • Rare reports of mild fever
  • Fatigue
  • Muscle aches during initial use
  • Theoretical risk of immune over-activation in autoimmune conditions
Related Research

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Medical Disclaimer

EDUCATIONAL CONTENT ONLY: The peptide information presented on this page is compiled from published scientific literature, peer-reviewed research, and publicly available clinical data. It is provided strictly for educational purposes and does not constitute medical advice, an endorsement of any specific peptide, or a recommendation for treatment. Many peptides discussed on this site have not received FDA approval for human therapeutic use. Some may be under active regulatory review or subject to restrictions on compounding under FDA Section 503A and 503B frameworks. The regulatory status of individual peptides can change at any time. Readers should verify the current legal status of any peptide in their jurisdiction before pursuing further information or consultation. If you are considering peptide therapy, seek guidance from a licensed physician or healthcare provider who specializes in peptide-based treatments and operates within applicable federal and state regulations.