Where to Buy TB-500 in 2026: Verified Sources & Pricing Guide
Published: 2026-03-26Updated: 2026-04-06Category: Buying Guides
TB-500 (the active fragment of Thymosin Beta-4) is the second most purchased research compound after BPC-157. It's frequently studied alongside BPC-157 — the combination is known as the "Wolverine Stack" in research communities. Here's how to find a verified source in 2026.
What Is TB-500?
| Property | Detail |
|---|
| Full Name | Thymosin Beta-4 Fragment |
| Amino Acids | 43 |
| CAS Number | 77591-33-4 |
| Molecular Weight | 4963.44 g/mol |
| Published Studies | 50+ preclinical |
| FDA Status | Category 2 — not approved for human use |
| Common Size | 10mg per vial |
TB-500 is a synthetic 43-amino-acid fragment of Thymosin Beta-4 (CAS 77591-33-4) with a molecular weight of 4963.44 Da. It was placed on the FDA Category 2 list in September 2023. See our legal status guide and vendor evaluation guide.
Why TB-500 Sourcing Matters
TB-500 is a 43-amino-acid compound — longer chains are more difficult to synthesize correctly and more susceptible to degradation during storage and shipping. Common issues include truncated sequences from incomplete synthesis, degradation from improper temperature control, and generic COAs not matched to specific batches.
How to Evaluate a TB-500 Vendor
The evaluation criteria are the same as any research compound: COA with HPLC chromatogram and mass spectrometry data, testing by an independent third-party laboratory, batch-specific lot numbers, RUO labeling, and no therapeutic claims. For the complete checklist, see our Vendor Evaluation Guide.
TB-500 Pricing in 2026
| Dosage | Market Range | Red Flag |
|---|
| 5mg vial | $25–$45 | Below $15 |
| 10mg vial | $40–$65 | Below $25 |
| 20mg vial | $70–$110 | Below $45 |
TB-500 + BPC-157: The Wolverine Stack
TB-500 and BPC-157 are frequently purchased together. TB-500 is a 43-amino-acid thymosin fragment (CAS 77591-33-4, MW 4963.44). BPC-157 is a 15-amino-acid pentadecapeptide (CAS 137525-51-0, MW 1419.53). Both are supplied as lyophilized powder at ≥99% HPLC purity. See BPC-157 | TB-500.
Pepta Labs offers a pre-built Wolverine Bundle containing both compounds at a discounted price with individual COAs for each.
Where to Buy TB-500 Now
Pepta Labs carries
TB-500 10mg at $47.31 per vial. 99.2% HPLC purity verified by independent third-party lab. COA available upon request. Free US shipping. Also available in the
Wolverine Bundle with BPC-157.
All information is sourced from published peer-reviewed literature and provided for educational purposes only. This content does not represent claims about products sold by Pepta Labs. All products are chemical reference materials for in-vitro laboratory research only. Not for human or animal consumption. See
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