TB-500 (TB4, 43aa) Capsules from Xcel Peptides

Xcel Peptides supplies TB-500 (TB4, 43aa) as an encapsulated research peptide for laboratory use. We test every batch independently before release, and we publish the certificate of analysis on this page, matched to the batch number on your bottle.

What Is TB-500 (TB4)

TB-500 is a research name for synthetic material related to thymosin beta-4 (Tβ4). Tβ4 is a naturally occurring peptide of 43 amino acids that binds actin, and it appears in almost all mammalian cells, with especially high levels in platelets and white blood cells. This product is the full-length 43-amino-acid sequence, not the shorter 17-23 fragment sold separately.

Specifications

The product is research grade, supplied as an encapsulated solid. The capsule serves only as a way to contain, store, and measure the material, and it says nothing about how anyone should use it. We verify every batch through third-party HPLC and identity analysis, and we document it with a matched COA. We ship every order with tracking.

Research Applications

Researchers study thymosin beta-4 in cytoskeletal biology and cell signaling research. Typical work examines how Tβ4 binds G-actin and regulates actin polymerization, and how that activity relates to cell migration, blood vessel formation, and inflammatory signaling in cell and animal models. Scientists also compare the full-length peptide with shorter fragments to learn which sequences drive specific cell responses.

These describe research applications, not therapeutic claims. The FDA has not evaluated this product, and researchers should not use it to diagnose, treat, cure, or prevent any condition.

Why Buy TB-500 TB4 Capsules From Xcel Peptides

Naming causes real confusion in this category. Suppliers sell the full 43-amino-acid peptide and the 7-amino-acid fragment under nearly identical names, and the two are not interchangeable in an experiment. Xcel Peptides labels the full-length sequence clearly and tests each batch to confirm it, so your records match the material you receive.

We also publish our results openly. You can match the batch number on your bottle to the COA before you start work, instead of relying on a generic purity claim.

Storage and Handling

Keep TB-500 (TB4) Capsules sealed, dry, and away from light and heat. Peptides absorb moisture easily, and humidity speeds up degradation, so close the bottle promptly after each use. Record the batch number and opening date in your lab notes.

Verifying Your COA

Check three things on the COA before you use this product. First, confirm the batch number matches your bottle. Second, confirm the test date is recent. Third, confirm the HPLC purity and the identity result match the full-length 43-amino-acid specification. If you need archived data for a previous lot, contact our team and we’ll pull it for you.

Disclaimer (place directly under description): Xcel Peptides supplies TB-500 (TB4, 43aa) Capsules for laboratory and research use only. They are not a drug, dietary supplement, or food, and researchers should not use them for human or animal consumption, or for diagnostic or therapeutic use. Nothing on this page constitutes medical advice.

Frequently Asked Questions

What is TB-500 (TB4)? It’s a research name for synthetic thymosin beta-4, a naturally occurring 43-amino-acid, actin-binding peptide. Xcel Peptides supplies the full-length version in a capsule format.

What is the difference between TB-500 (43aa) and the TB-500 Fragment (17-23)? The 43aa product is the full thymosin beta-4 sequence. The 17-23 fragment is a much shorter 7-amino-acid segment of it, and researchers choose between them depending on whether they need the whole protein or just that region.

Why is this product in capsule format? The capsule is a containment and measurement format for research handling. It doesn’t imply any route of use.

Does TB-500 (TB4) come with a COA? Yes. Xcel Peptides ships every bottle with a batch-matched certificate of analysis confirming identity and purity.

How should I store TB-500 (TB4) Capsules? Keep them sealed in a cool, dry place, protected from light and moisture.

How fast does Xcel Peptides ship this product? We ship most orders within 1 to 2 business days, with tracking included.