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TB-500 is a synthetic version of Thymosin Beta-4 , a naturally occurring peptide in humans

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Research Note: A 2025 peer-reviewed cardiac remodeling study (Thymosin Beta-4 Modulates Cardiac Remodeling by Regulating ROCK1 Expression in Adult Mammals, IJMS ) reported that Thymosin Beta-4 regulates ROCK1 expression to support cardiac tissue repair after injury in mammalian models, underscoring TB-500's actin-mediated healing mechanism though the research remains preclinical rather than human-validated