TB-500 for Sale: 10 mg Price, COA and Which Version You Are Buying
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Research use only. Peptides supplied by Peptryn are sold strictly for in vitro and preclinical laboratory research. They are not approved by the FDA for human or veterinary use, and nothing here is medical advice, a dosing recommendation, or an instruction for self-administration. This page explains what Peptryn’s TB-500 listing includes and how to check any TB-500 vial.
Quick answer: Peptryn sells TB-500 as a 10 mg lyophilized research vial for $89.99, which is $9.00 per mg. The listing is full-length thymosin beta-4 acetate, 43 amino acids and 4,963.44 Da. Lot 2026-08-05 reads 99.84% purity by HPLC-UV-MS with a negative endotoxin result, tested by MZ Biolabs. Some suppliers use the TB-500 name for a shorter fragment, so compare the molecular weight when you compare listings. TB-500 is not an FDA-approved drug, and Peptryn sells it only for laboratory research to buyers who are 21 or older.
This page covers the buying side: the price, the naming problem, and the checks that matter for TB-500. For the molecule itself, read our TB-500 guide. For BPC-157 and TB-500 together, see our BPC-157 and TB-500 buying guide.
Key takeaways
- The 10 mg vial is $89.99 ($9.00 per mg) and ships free on orders over $150, dispatched the same day from the USA.
- Lot 2026-08-05 reads 99.84% purity and a negative endotoxin result. The lab analyzed it on 2026-08-24.
- In our September data report the lab measured 12.80 mg against the 10 mg label (+28.0%). That is one lot from one lab.
- The expected mass is 4,963.44 Da (C212H350N56O78S). A listing with a much lower mass is a different molecule.
Last verified November 12, 2026. Prices and lot details are as listed on that date and change with each batch, so check the product page and certificate before you rely on a number. Sources are listed at the end. For laboratory and research use only. Nothing here is medical or legal advice.
What Peptryn’s TB-500 vial includes
| Item | Detail |
|---|---|
| Compound | Thymosin beta-4 acetate (TB-500), full length |
| Form and size | Lyophilized powder, 10 mg |
| Listed price | $89.99 ($9.00 per mg) |
| Lot | 2026-08-05 |
| Lab analysis date | 2026-08-24 |
| Purity (HPLC-UV-MS) | 99.84% |
| Endotoxin | Negative |
| Measured quantity | 12.80 mg against the 10 mg label (+28.0%), from our September data report |
| Molecular weight | 4,963.44 Da |
| Formula and CAS | C212H350N56O78S, 77591-33-4 |
| Storage | Lyophilized powder at -20 ยฐC, protected from light and repeated freeze-thaw cycles |
| Shipping | Free over $150, same-day dispatch from the USA |
TB-500 can mean two different molecules
Thymosin beta-4 is a naturally occurring peptide of 43 amino acids and about 4,963 Da. Research suppliers sell it as TB-500, and some use that name for a shorter fragment instead. Peptryn’s listing is the full-length acetate.
The two do not share a mass, so a price per milligram across them compares different products. Check the molecular weight on the listing and on the certificate before you compare. If a seller will not state it, that tells you what you need to know.
Five checks before you buy any TB-500 vial
- Match the lot. Check that the lot on your vial appears on the report. Peptryn’s TB-500 lot is 2026-08-05, with a lab analysis date of 2026-08-24. A report with no lot number says nothing about the vial in your hands.
- Check the mass. The expected mass for full-length thymosin beta-4 is 4,963.44 Da. The lab report should show a mass in that region. A report that prints only a purity percentage does not confirm which version is in the vial.
- Read purity as what it is. The percentage is the main peak’s area against all detected peaks. At 99.84% almost nothing else registered, and the figure still cannot show how much TB-500 is in the vial. See our guide to peptide purity.
- Find the quantity line. Reports that print a measured amount per vial are the ones worth asking for. Our September data report recorded 12.80 mg against a 10 mg label for this lot.
- Open the lab’s own record. For this lot, MZ Biolabs hosts a purity and identity report and a separate endotoxin report, reachable from the certificate or its QR code. A PDF that only the seller hosts cannot be checked against anything.
What the 12.80 mg result does and does not mean
Our September report set the lab’s measured amount against the label for 21 components across 15 lots. TB-500 measured 12.80 mg against 10 mg (+28.0%), above the report’s median of +16.4%.
The figure comes from one lot and one lab with no stated uncertainty. Take it as a measurement of the tested batch only. Peptryn is the client named on each certificate, so each result links out to the lab for you to verify.
Price per milligram and what to compare
At $89.99 for 10 mg, full-length TB-500 comes to $9.00 per mg. That figure is fair to compare only with listings of full-length thymosin beta-4 in the same size that come with a lot-matched report.
Orders over $150 ship free, so two vials ($179.98) qualify. Peptryn does not say it is the cheapest, and prices change with each lot, so run the division yourself for every seller.
Ordering from Peptryn
The TB-500 10 mg vial has its own product page, with the certificate linked from the testing section. Orders ship from the USA with same-day dispatch to buyers who are 21 or older and who confirm qualified research use. The listing has no prescribing information, because the vial has no use outside the laboratory.
Frequently asked questions
Where can I buy TB-500 for research?
Peptryn sells TB-500 as a 10 mg lyophilized research peptide on its TB-500 product page. It is sold only for laboratory research, to buyers who are 21 or older and who confirm qualified research use.
How much does TB-500 cost?
Peptryn lists the 10 mg vial at $89.99, which is $9.00 per mg, and ships free over $150. Prices change, so check the product page.
Is TB-500 the same as thymosin beta-4?
Peptryn’s TB-500 is full-length thymosin beta-4 acetate, 43 amino acids and 4,963.44 Da. Some suppliers use the TB-500 name for a shorter fragment, so compare molecular weights.
Is Peptryn’s TB-500 third-party tested?
Yes. MZ Biolabs tested lot 2026-08-05 and reports 99.84% HPLC-UV-MS purity and a negative endotoxin result. The report is on the lab’s site, and Peptryn is the client that ordered it.
Is TB-500 FDA approved?
No. TB-500 is not an FDA-approved drug. Peptryn supplies it as a laboratory research material only.
How is TB-500 stored?
Peptryn’s product specification says to keep the lyophilized powder at -20 ยฐC, protected from light and from repeated freeze-thaw cycles.
Sources and related pages
- Peptryn TB-500 product page
- TB-500 certificate of analysis (Peptryn)
- MZ Biolabs report (hosted by the testing laboratory)
- Peptide COA Data Report, Q3 2026 (September 26, 2026)
- COA Library, how to read a certificate of analysis, third-party tested peptides
- TB-500 guide, BPC-157 and TB-500 buying guide
Peptryn products are sold for laboratory research use only, to buyers who are 21 or older. The information on this page has not been evaluated by the U.S. Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease.
