TB-4 (Thymosin Beta-4)

TB-500 — Thymosin Beta-4 Fragment Research Peptide

TB-500 is the synthetic N-terminal fragment of Thymosin Beta-4 (TB-4), a 43-amino-acid protein that is one of the most abundant actin-binding peptides in the human body. The “TB-500” name refers specifically to the active fragment that carries most of TB-4’s actin-regulating and cell-migration activity, and it is the form used in the majority of published repair-peptide literature. It is most often studied on its own for actin sequestration and cell-motility work, or paired with BPC-157 in tissue-repair study designs.

Why TB-500’s Actin Binding Matters

The hallmark activity of TB-500 is actin sequestration. Actin is the cytoskeletal protein that cells use to move, divide, and respond to injury. By binding G-actin monomers, TB-500 regulates the pool available for polymerization into the filaments that drive cell migration. That makes it one of the only peptides in the repair toolkit whose core mechanism is directly cytoskeletal rather than receptor-based.

TB-500 vs BPC-157

These two are the most commonly paired repair peptides in the published literature, so the mechanistic distinction matters.

The two mechanisms are non-overlapping, which is why they are frequently combined. WWP stocks BPC-157 / TB-500 as a co-lyophilized blend as well as single vials of each.

Forschungsanwendungen

TB-500 is used in studies examining:

• Muscle, tendon, and ligament repair models
• Cardiovascular repair and post-infarct remodeling
• Skin-wound healing and re-epithelialization
• Endothelial-cell migration and angiogenesis
• Cytoskeletal dynamics and cell motility
• Combined repair-peptide designs paired with BPC-157

Technische Daten

Rekonstitution

TB-500 arrives as a freeze-dried powder and is reconstituted with bacteriostatic water:

Gesamtmenge in mg im Fläschchen ÷ hinzugefügte Wassermenge in ml = mg pro ml

Beispiel: Eine 5-mg-Ampulle + 2 ml bakteriostatisches Wasser = 2,5 mg pro ml. Eine 10-mg-Ampulle + 2 ml = 5 mg pro ml.

Nach der Zubereitung bei 2–8 °C lagern und innerhalb von 28–30 Tagen verbrauchen.

Anmerkungen zum Protokoll

The following values are reference points extracted from published TB-500 research – not instructions. TB-500 has a notably longer functional half-life than BPC-157, which is reflected in how published protocols space out administrations.

• Dose range reported in the literature: 2-2.5mg per administration in most published protocols
• Administration frequency in published studies: 2-4x weekly for an initial loading window, then tapered to once weekly
• Study durations reported: 4-8 weeks for acute repair endpoints

Common Questions About TB-500 Research

What does TB-500 do in research?

Its core mechanism is actin binding – it sequesters G-actin monomers and regulates the pool available for filament assembly. Downstream, that supports cell migration, angiogenesis, and wound-repair signaling. Published studies most often track repair endpoints in muscle, cardiovascular, and skin tissue models.

What is the difference between BPC-157 and TB-500?

They act through different pathways. BPC-157 is most often cited in angiogenesis, nitric-oxide, and gut-signaling literature. TB-500 is most often cited in actin-regulation, cell-migration, and muscle/cardiovascular literature. Researchers combine them because the mechanisms are non-overlapping.

How is TB-500 different from full-length Thymosin Beta-4?

TB-500 is the synthetic N-terminal fragment of Thymosin Beta-4 that retains the core actin-binding motif. The full-length TB-4 molecule includes additional residues that are not required for the sequestration activity, which is why the fragment is the standard research tool.

Is TB-500 FDA approved?

No. TB-500 (Thymosin Beta-4) is not FDA approved for any human use. It is listed on the WADA Prohibited List for competitive athletes. Every vial WWP ships is labeled and sold strictly for laboratory and research use only.

How is TB-500 stored?

Ungeöffnete Fläschchen werden bei 2–8 °C gelagert und sind mindestens 12 Monate haltbar. Nach der Rekonstitution mit bakteriostatischem Wasser wird die Lösung bei 2–8 °C aufbewahrt und innerhalb von 28–30 Tagen verbraucht.

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