Peptide • Muscle, performance & recovery
TB-500
Also called Ambiguous market name; sometimes TB-500(17-23), sometimes thymosin beta-4
What it is, the potential benefits being studied, and what the evidence supports right now.
Exploratory research•Research-stage compound•Checked 2026-08-21
01 • Start here
Potential benefits being studied.
Soft-tissue repair, recovery, and injury claims.
- Recovery & tissue research
02 • Why it stands out
The simple explanation.
TB-500 is discussed in recovery research because thymosin-beta-4 biology is connected with cell movement, blood-vessel formation, and tissue repair.
03 • Research highlight
Why researchers are interested.
Its recovery story is scientifically interesting, but product identity matters because products sold under the name are not always the same molecule.
Evidence detailsStudy limits, status, and safety context
Study summary: The name TB-500 is used inconsistently. Full-length thymosin beta-4 is about 4.96 kDa, while the acetylated seven-residue fragment Ac-LKKTETQ is roughly 889 Da and is a different molecule.
What to keep in mind: Evidence and regulatory status cannot be graded accurately until the exact sequence and molecular identity are specified. A purity number cannot fix an identity-labeling mismatch.
Potential benefits describe research questions, not a promise that a product will produce the same result in a person.