TB-500
Actin Regulation & Cell Migration Pathways
What is TB-500?
TB-500 is a synthetic peptide corresponding to a bioactive fragment of Thymosin Beta-4 (Tβ4), a naturally occurring 43-amino-acid protein found in nearly all mammalian cells and in high concentration in wound fluid and platelets. The research material is typically supplied as an acetylated short sequence (Ac-LKKTETQ) with a molecular weight near 887.0 Da, representing the actin-binding region thought to carry much of the parent protein's activity. Because Thymosin Beta-4 is a major intracellular actin-sequestering protein, TB-500 research centers on its influence over the cytoskeleton rather than on receptor agonism in the conventional sense.
Mechanistically, animal and cell studies indicate that TB-500 regulates actin polymerization — the assembly and disassembly of the protein filaments that give cells structure and drive movement. By modulating the pool of available actin, it is proposed to promote cell migration, a process central to wound closure and tissue remodeling. Preclinical models have also associated it with endothelial cell migration and angiogenesis, and with anti-inflammatory activity. Investigators studying it in recovery and wound-healing contexts frequently contrast its cytoskeletal, migration-focused profile with BPC-157's angiogenic, growth-factor-oriented profile, which is the basis for combining the two in the Wolverine blend.
As with BPC-157, the evidence for TB-500 is overwhelmingly preclinical. There are essentially no completed, controlled human efficacy trials, and effects observed in animal or in-vitro systems cannot be assumed to occur in people. TB-500 is not approved for human use by any regulatory authority and is prohibited in sport by anti-doping agencies. It is provided exclusively for research and educational purposes and is not intended for human consumption.
Molecular data
Mechanism of action
In preclinical research, TB-500 is associated with the following pathways and targets:
Research highlights
- Regulates actin polymerization essential for cell motility
- Promotes endothelial cell migration and angiogenesis
- Demonstrates anti-inflammatory properties in preclinical models
- Synergistic with BPC-157 in the Wolverine blend
Frequently asked questions
How is TB-500 different from BPC-157?
Research frames the two around different mechanisms: TB-500 is studied primarily for regulating actin polymerization and promoting cell migration, while BPC-157 is studied for VEGFR2-mediated angiogenesis and growth-factor signaling. Because these pathways are considered complementary in tissue-repair models, the two are sometimes combined in the Wolverine blend. Neither is approved for human use, and both are supported mainly by preclinical data.
What is TB-500 derived from?
TB-500 is a synthetic peptide based on a fragment of Thymosin Beta-4, a naturally occurring protein present in most cells and abundant in wound fluid and platelets. The research material typically corresponds to the actin-binding region (Ac-LKKTETQ) believed to account for much of the parent protein's activity in laboratory studies.
What does TB-500 do in preclinical research?
In animal and cell studies, TB-500 has been associated with regulating actin polymerization, promoting cell and endothelial migration, supporting angiogenesis, and exhibiting anti-inflammatory properties. These are laboratory observations and have not been demonstrated as clinical effects in humans.
Is TB-500 approved or legal for human use?
No. TB-500 is not approved for human use by any regulatory authority and is prohibited in sport under anti-doping rules. It is sold strictly for research and educational purposes only, not for human consumption.
Does TB-500 have human clinical evidence?
There are essentially no completed, controlled human efficacy trials of TB-500. The available evidence comes almost entirely from preclinical cell and animal models, and such findings often do not translate to humans, so any human-benefit claim should be regarded as unproven.
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For research and educational purposes only. TB-500 is not approved for human use by any regulatory authority, and nothing on this page constitutes medical advice, diagnosis, or treatment. Research findings referenced here are predominantly preclinical.