1
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TB-500 and thymosin-beta-4 are often discussed as if every study tested the same thing.

2
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That shortcut can make the evidence look stronger than it is.

3
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Thymosin-beta-4 is involved in actin biology, which helps cells organize and move.

4
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Early wound research studied cell migration and wound repair in rats.

5
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A result for full-length thymosin-beta-4 cannot automatically validate a fragment or a product sold under

6
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another name. Sequence, purity, formulation, and clinical outcomes all need checking.

7
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WADA’s 2026 list prohibits thymosin-beta-4 and derivatives such as TB-500 at all times.

8
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Neither laboratory activity nor a research-only label establishes a safe recovery treatment.