For laboratory research use only. Not for human consumption. All compounds referenced in this article are sold by Explicit SARMs solely as reference materials for in-vitro and animal research by qualified professionals. Nothing here is medical advice, and no statement has been evaluated by the FDA. These materials are not intended to diagnose, treat, cure or prevent any disease.
TB-500 is widely sold, and loosely described. Before it reaches the bench, confirm what it is, how it was verified, and whether the format suits your method.
Know What You Are Buying
TB-500 is a synthetic peptide based on the actin-binding region of thymosin beta-4, a naturally occurring 43-amino-acid protein that regulates actin, the main structural protein of the cell cytoskeleton. Many listings use “TB-500” and “thymosin beta-4” interchangeably, but the fragment and the full protein are different molecules. Check that the product name and the COA describe the same one.
Check the Certificate of Analysis
A useful COA names the compound, the lot number, the methods used (typically HPLC for purity and mass spectrometry for identity) and the test date. The lot number should match your vial. A certificate of analysis is available on request through our contact page, and our products are purity-tested by an independent third-party lab. Our guide to reading a COA explains what each section of the report should contain.
Choose a Format
- Lyophilized vials: TB-500 5mg and TB-500 10mg, for solution-based work.
- Capsules: TB-500 Capsules, for workflows built on fixed units.
- Blends: the BPC-157 / TB-500 Blend 10mg pairs it 1:1 with BPC-157. See the blend FAQ.
Packaging and Records
Look for sealed vials, clear labels and protection from moisture and light. Record the lot number, COA, date received and storage conditions.
Frequently Asked Questions
Is TB-500 approved for human use?
No. It is not approved by the FDA or any other regulator. TB-500 and thymosin beta-4 appear on the World Anti-Doping Agency’s prohibited list under S2 (peptide hormones, growth factors, related substances and mimetics). It is sold strictly for laboratory research, and we do not provide dosing, administration or usage guidance.