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Thymosin Alpha-1 vs TB-500: Which Is Right for You?

Quick verdict Thymosin alpha-1 (Zadaxin) is approved in many countries for immune modulation but is not FDA-approved in the US; its 503A Category 2 nomination was withdrawn. TB-500 (thymosin beta-4) is prohibited for compounding and is WADA prohibited. Neither

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  • Quick verdict
  • Thymosin alpha-1 (Zadaxin) is approved in many countries for immune modulation but is not FDA-approved in the US; its 503A Category 2 nomination was withdrawn. TB-500 (thymosin beta-4) is prohibited for compounding and is WADA prohibited. Neither is a straightforward legal option in the US for human use.
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Comparison

Effectiveness Comparison

Clinical evidence for Thymosin Alpha-1 spans multiple Phase II and Phase III trials across various therapeutic indications[28]. The landmark Phase III trial for chronic hepatitis …

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Comparison

Side-by-Side Comparison

Class — Thymosin Peptide FDA Status Research Use Primary Uses modulation of T-cell-related pathways, toll-like receptor activation, cytokine-associated signaling Tissue Repair, Re…

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Comparison

Cost Comparison

Thymosin Alpha-1 pricing through legitimate compounding pharmacies ranges from $150-300 per month for standard dosing protocols, with costs varying based on pharmacy location and …

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Comparison

Quick Comparison

Protein family: Thymosin Alpha-1 belongs to the alpha thymosin family (prothymosin alpha derivative); TB-500 belongs to the beta thymosin family (a Thymosin Beta-4 fragment). Sequ…

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