A naturally occurring peptide present in virtually all human and animal cells. Extensively studied for its role in cell proliferation, migration, and angiogenesis in in-vitro and preclinical research contexts.
Add sterile bacteriostatic water to the vial to achieve your target working concentration.
Storage conditions: -20°C, dry
Form: Lyophilised
Solubility: Water, BAC water
Current batch: TB10-260514-195
HPLC purity: 99.58%
MS verified: Yes
Expiry: May 2028
The certificate of analysis for this batch is issued with your order.
C₂₁₂H₃₅₀N₅₆O₇₈S · 4,963.5 Da
TB-500 Thymosin Beta-4 (TB-500)
out of stock
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Working out volumes? Peptide calculator · Reconstitution guide
TB10-260514-195 · HPLC 99.58%
The batch code matches the vial you will receive. Full analysis — purity, mass spectrometry, residual solvents and microbial limits — is issued with your order.
| Content | 2mg |
| Purity | 99.58% HPLC |
| Form | Lyophilised |
| Storage | -20°C, dry |
| Solubility | Water, BAC water |
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TB-500
2mg · £17.99
TB-500 is a synthetic peptide corresponding to the active region of thymosin beta-4, a naturally occurring protein involved in actin regulation. It appears throughout the tissue-repair research literature, frequently alongside BPC-157.
A 2026 study in Joint Diseases and Related Surgery examined both compounds in a rat Achilles tendon model with histopathological and biomechanical endpoints — a useful illustration of where the evidence base sits, which is predominantly animal work.
Mechanism in the literature
Thymosin beta-4 is described in the literature principally as an actin-sequestering protein, with published research examining consequences for cell migration and angiogenesis in models of tissue injury.
A 2026 review in Sports Medicine of approved and unapproved peptide therapies for musculoskeletal injuries places TB-500 among the unapproved compounds. It holds no marketing authorisation and is supplied for laboratory research only.
Handling and reconstitution
Supplied lyophilised at 2mg, 5mg and 10mg. Room temperature before reconstitution, bacteriostatic water down the inner wall, gentle swirling until dissolved.
Storage and stability
Lyophilised at -20°C, protected from light, two-year retest date. Reconstituted solution refrigerated and used within a short window; avoid repeated freeze-thaw cycling.
Common questions
What purity is BSR's TB-500?
The current batch tests at 99.58% by HPLC against a not-less-than-98% specification, with LC-MS identity confirmation at 4963.3 Da against a theoretical 4963.40. The certificate is issued with your order.
What is the difference between TB-500 and thymosin beta-4?
Thymosin beta-4 is the full 43-amino-acid protein. TB-500 is a synthetic peptide corresponding to its active region, which is why the two names appear interchangeably in supplier listings even though they are not the same molecule.
Is TB-500 an approved medicine?
No. A 2026 review in Sports Medicine categorises it among unapproved peptide therapies. It holds no MHRA or FDA marketing authorisation and is supplied strictly for laboratory research use.
- Biçer O. et al. (2026) — Effects of BPC-157 and TB-500 on Achilles tendon healing in rats, Joint Diseases and Related Surgery
- Mendias C.L. & Awan T.M. (2026) — Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries, Sports Medicine
Cited as research context. BSR has no involvement in these studies and they do not constitute claims about this product.
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