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The FDA's current review specifically addresses TB-500 (Thymosin Beta-4 Fragment, LKKTETQ) not the full-length Thymosin Beta-4 protein

Updated June 15, 2026

Toxicol Lett 112113:133142 McCann UD, Ridenour A, Shaham Y, Ricaurte GA (1994) Serotonin neurotoxicity after (+/)3,4-methylenedioxymethamphetamine (MDMA
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