Last updated: June 2026 · Research use only
Short answer: Buy TB-500 (Thymosin Beta-4) only from a vendor publishing a batch-specific, independent-lab COA at ?96% HPLC purity (?99% excellent) with mass-spec identity, shipping domestically. Proxiva Labs carries research TB-500 from $35, includes a COA with every order, and ships same-day before 4 PM EST.
What to check before you buy TB-500
- Batch COA before purchase — see How to Read a Peptide COA.
- HPLC ?96% (?99% excellent) + mass-spec identity.
- U.S. shipping + a stable supplier.
Buying TB-500 from Proxiva Labs
- Research TB-500 (Thymosin Beta-4) from $35; also in the Wolverine Blend (BPC-157 + TB-500) from $52.50.
- COA with every order, independent-lab tested (Vanguard) — published TB-500 purity 99.41% HPLC (Wolverine Blend at 99.80%); certificates at /test-results/.
- Same-day shipping before 4 PM EST, 2–3 business day delivery, plain-packaged + tracked, free over $150.
- FDA-registered, GMP-certified U.S. facilities.
See how it compares in our Best Research Peptide Vendors 2026 guide.
FAQ
Is TB-500 the same as Thymosin Beta-4? TB-500 is the commonly used research name for the Thymosin Beta-4 fragment peptide.
How much does research TB-500 cost? At Proxiva Labs, from $35, or $52.50 for the BPC-157 + TB-500 Wolverine Blend.
What purity is Proxiva’s TB-500? The published independent-lab (Vanguard) COA shows TB-500 at 99.41% HPLC — see /test-results/.
Does it come with a COA? Yes — a COA with every order, with published certificates at /test-results/.
Research-use-only disclaimer: TB-500 and all products referenced are intended strictly for research and laboratory use only. They are not approved for human consumption, medical application, or diagnostic use.
All products are sold strictly for research purposes only. Not for human consumption.