COA & vendor comparison
Where to buy TB-500 (Thymosin Beta-4)
4 research-peptide vendors compared with public HPLC purity records. Lot-level COAs where published, marketed specs where not. Verify the certificate before you buy.
Vendor comparison
Sorted by published purity. Per-lot COA = vendor publishes a per-batch certificate. Vendor spec = marketed purity claim, COA on request.
- Lot
31-01260229- Test date
- Feb 10, 2026
- Lot
31-03250428- Test date
- Jul 31, 2025
Discount codes
Injectables
Ascension Peptides
Code ENHANCED takes 50% off the entire catalog at checkout.
Oral / Nasal
Limitless Biotech
Code ENHANCED takes 15% off oral capsules and nasal sprays.
Frequently asked questions
Where can I buy TB-500 (Thymosin Beta-4) with a verified COA?
4 vendors are tracked here with public certificates of analysis: Ascension Peptides, Sports Technology Labs, Direct Peptides, Swiss Chems. The Per-lot COA badge marks vendors who publish a per-batch certificate; Vendor spec means a marketed purity claim only. Click the source link on each row to verify the document before you buy.
What purity should TB-500 (Thymosin Beta-4) be?
Research-grade synthetic peptides typically test 98–99.5% by HPLC. Across the records on this page, TB-500 (Thymosin Beta-4) ranges 99.00% to 99.97%. Anything below 95% is below the standard threshold for analytical-grade material; anything below 90% indicates significant impurities and warrants caution.
Which vendor has the highest verified TB-500 (Thymosin Beta-4) purity?
In the records covered, Ascension Peptides reports 99.97% (test date Feb 10, 2026) for TB-500 (Thymosin β4) 5mg. Verify against the linked source before purchasing.
Is there a discount code for TB-500 (Thymosin Beta-4)?
Both partner vendors offer the code ENHANCED. Ascension Peptides (injectable research vials): 50% off the catalog. Limitless Biotech (oral capsules and nasal sprays): 15% off. Codes apply at checkout.
How is the COA verified?
Every record on this page links to the vendor's public certificate. Per-lot COAs (highest trust) come from independent third-party labs and report the analytical method, lot number, test date, and integrated peak purity. Vendor-spec rows reflect a marketed purity claim and link to the vendor's product page so you can request the per-batch document directly.