yes i take peptides · shopping companion
TB-500
Thymosin Beta-4 fragment
Category · For RecoveryStatus · RUOCitations · 60Cancer Concern
The verdict
Depends — and "depends" leans cautiously toward yes only for a stubborn soft-tissue injury with a defined end date.
By source — cost, legality, risk
- BrandNot availableNone — no FDA approval path; Category-2-adjacent postureNo FDA-approved TB-500; same regulatory zone as BPC-157.
- Compounded 503A pharmacy$200–$400/mo where still soldRx · contested (HHS Feb 2026 reclassification announced; FDA list not yet updated)Mid. Some compounders ship under contested legal interpretations; pharmacies still selling are legally exposed.
- RUO research peptide$80–$200/moSold 'for research only'Highest. The dominant supply; some vendors sell full Tβ4 at fragment prices, identity by mass spec is the only check.
- Gray-market raw$15–$35/moUnregulated overseas importCrypto/Wise pay, identity-uncertain; WADA-prohibited for tested athletes regardless of source.
Stop signals · abort if
- any new mass or unexplained pain
- persistent severe lethargy
- new pigmented lesion or mole change
- persistent severe fatigue
- allergic reaction
Sources · top 5 of 60
- 01Goldstein AL, et al. Thymosin β4: a multi-functional regenerative peptide. Basic properties and clinical applications. Expert opinion on biological therapy. 2012;12(1):37-51. PMID: 22074294.
- 02Bubb MR. Thymosin beta 4 interactions. Vitamins and hormones. 2003;66:297-316. PMID: 12852258.
- 03Rahman OF, et al. Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions. Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews. 2026;10(1). PMID: 41490200.
- 04Hannappel E. beta-Thymosins. Annals of the New York Academy of Sciences. 2007;1112:21-37. PMID: 17468232.
- 05Sun HQ, et al. The beta-thymosin enigma. Annals of the New York Academy of Sciences. 2007;1112:45-55. PMID: 17495248.