TB-500

Thymosin Beta-4 synthetic fragment. A 43-amino acid sequence derived from the naturally occurring protein Thymosin Beta-4. One of the most studied actin-sequestering peptides in the research literature.

98%+ purity 5mg vial HPLC tested CoA published US warehoused

$72 per vial · free shipping over $150

View Certificate of Analysis

Research purposes only. Not for human consumption. Not intended to diagnose, treat, cure, or prevent any condition. For laboratory and in vitro research use only. Must be 18+ to purchase.

About this compound

TB-500

TB-500 is a synthetic analogue of Thymosin Beta-4, a protein involved in actin sequestration and cytoskeletal organisation. The synthetic fragment used in research contexts is a 43-amino acid sequence that has been studied in a wide range of in vitro and animal model settings.

What I noticed when surveying the research landscape around TB-500 was that it appears frequently alongside BPC-157 in published studies. Researchers consistently describe the two compounds as complementary in their mechanisms, which makes them a natural pairing in multi-compound research protocols.

My experience reviewing the literature suggests that TB-500 is particularly well-characterised in animal model research. The volume of available published studies makes it straightforward to design experimental protocols with strong methodological grounding.

Our TB-500 is synthesised to 98%+ purity standards and verified by HPLC at an independent ISO/IEC 17025-accredited laboratory. The Certificate of Analysis for batch #2605 is available on our Lab Results page.

Specifications

43-amino acid sequence
Molecular weight: 4963.5 g/mol
CAS: 77591-33-4

Format

5mg lyophilised powder
Single-use amber glass vial with rubber stopper and aluminium crimp cap

Storage

Lyophilised: -20°C, 24 months
Reconstituted: 2-8°C, 28 days. Protect from light and moisture.

Purity

99.0%
HPLC verified · Batch #2605

Research Notes

What researchers have observed

What I noticed

Across the studies I reviewed, TB-500 demonstrated consistent behaviour in aqueous research environments. Its actin-binding properties are among the most cited functional characteristics in the literature, making it a reliable model compound for cytoskeletal research.

Research pairing

My experience with the TB-500 literature consistently shows it paired with BPC-157 in research protocols. The two peptides are frequently cited together, with researchers describing distinct but potentially synergistic mechanisms in animal model contexts.

Literature depth

Thymosin Beta-4 and its synthetic fragments are among the better-characterised peptides in the research space. There is a substantial body of peer-reviewed work to reference when designing protocols, spanning multiple decades of published research.

Quality note

TB-500 is a larger peptide than many in this class, which makes synthesis consistency more technically demanding. Our batch #2605 comes in at 99.0% HPLC verified purity. The full CoA with sequence confirmation is available at the Lab Results page.

DISCLAIMER: TB-500 is sold by Apex Research Labs strictly for in vitro and laboratory research purposes only. It is not intended for human consumption. It is not a drug, supplement, or food product. This product has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease or medical condition. You must be 18 years of age or older to purchase. By purchasing this product, you confirm that you are a qualified researcher using this compound solely for lawful scientific research purposes and in compliance with all applicable local, state, and federal laws and regulations. Apex Research Labs assumes no liability for any misuse of this product.