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Subsequent work documented prolonged GH and IGF-1 stimulation in Phase 1/2 clinical trials (PMID 16352683) and characterised once-daily administration profiles (PMID 16822960)

TB-500 (a synthetic fragment of Thymosin Beta-4) has a distinct actin-binding and cellular-migration research profile

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However, observational studies suggest that whilst acute toxicity remains exceptionally rare, sustained very high levels of B12particularly from supplements or injectionsmay be associated with certain health concerns, though these are correlations rather than proven causal relationships