TB-500 — compounding legality overview

Thymosin beta-4 fragment

Common names: Thymosin Beta-4 fragment, TB 500

PeptSense tracks TB-500 across federal 503A Bulks List chain steps, PCAC advisory context, and state board positions. Status is never inferred from forums or marketing sites — only published citations with effective dates.

Federal 503A snapshot (illustrative)

Latest published federal event for 503A compounding pharmacies. Sign in for your licensed states and facility type.

Summary

Honest curation baseline (2026-08-01): no confident Bulks List / USP / approved-component chain step assigned for TB-500 in this pass. Unclear until a human verifies a substance-specific citation. Not a legal determination.

Citation

FDA — 503A bulk drug substances page

Effective

Aug. 1, 2026

Not a legal determination. Replace placeholder citations during curation.

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