PepEvolutionTB-500
Thymosin Beta-4 fragment
BPC-157’s common partner for systemic tissue repair — widely sourced, but the human evidence is thin.
Verdict — C · Emerging / Mixed
Decent availability and a reasonable safety profile, but the human data is thin and a theoretical proliferation concern keeps it out of A/B territory. Viable for the informed; pair sourcing with a fresh COA.
Overview
TB-500 is a synthetic fragment associated with thymosin beta-4, used for systemic tissue repair and often stacked with BPC-157. Sourcing is broadly available and frequently COA-tested, but the published human evidence base is limited.
PepScore Breakdown — the four axes
Evidence
35% weightHow strong is the published human science?
Sourcing & COA
30% weightOur moatCan a buyer obtain an independently-verified, high-purity version? — our proprietary layer.
Safety & Risk
25% weightWhat is the real-world harm potential?
Practicality
10% weightHow easy is it to actually run a verified version?
Sources & Citations
Every claim cites a primary source. Citations are machine-audited against NCBI — see methodology.
Best-Sourced Vendor
Ascension Peptides
Vendor 82 · AStrong vendor grade (A) and the best verified supply right now for TB-500 — batch-matched independent COA freshness 90%.
Ranked by Source Match = Vendor Grade × batch-COA freshness. Affiliate status is never an input to any grade, and a paying vendor never outranks a non-paying one on a tie.How this works →
Educational only — not medical advice. PepScore is an educational research grade, not a prescription or dosing recommendation. Some vendor links are affiliate links — this never affects grades. Consult a licensed healthcare provider before using any compound.