The Peptide Directory

Not approved (research only)Thymosin beta-4 fragmentTissue repair research

TB-500 fragment 17-23

This is the 17-23 fragment (LKKTETQ) of thymosin beta-4, sold by vendors as a shorter TB-500 variant; human data are absent.

Last reviewed by The Peptide Directory Editorial Team

What is TB-500 fragment 17-23?

This is the 17-23 fragment (LKKTETQ) of thymosin beta-4, sold by vendors as a shorter TB-500 variant; human data are absent. TB-500 fragment 17-23 is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.

Key takeaways

  1. TB-500 fragment 17-23 is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.
  2. PubMed indexes 0 papers on TB-500 fragment 17-23 (0 tagged as clinical trials) as of October 19, 2026.
  3. 6 vendors in our directory listed TB-500 fragment 17-23 in their public catalog on October 19, 2026.

Regulatory & access status

TB-500 fragment 17-23 is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.

Sellers that market unapproved peptides for human use can receive FDA warning letters; our vendor directory links any letter we found on fda.gov.

How much research exists on TB-500 fragment 17-23?

PubMed indexes 0 papers mentioning TB-500 fragment 17-23 in the title or abstract, 0 of them from the last five years and 0 tagged as clinical trials (search run October 19, 2026; repeat the search).

What the evidence does not show

  • Paper counts measure research attention, not whether TB-500 fragment 17-23 works or is safe.
  • No clinical trial in humans is tagged in PubMed under this name.
  • No FDA review of any "research use only" product's identity, purity, sterility or dose.

Research suppliers that list TB-500 fragment 17-23

6 vendors in our directory listed a product matching TB-500 fragment 17-23 in their public catalog on October 19, 2026. Listed alphabetically; a listing is not an endorsement. Research use only.

Prices per mg, where we could verify them, are on our price comparison.

TB-500 fragment 17-23 reconstitution math

Lab arithmetic only, not dosing guidance: use the peptide calculator to turn a vial size and diluent volume into a concentration.

TB-500 fragment 17-23 FAQ

Is TB-500 fragment 17-23 FDA-approved?

TB-500 fragment 17-23 is not approved by the FDA for any use; products sold under this name are labeled for research use only, not for human consumption.

Is TB-500 fragment 17-23 safe?

There are no published human safety trials of TB-500 fragment 17-23 that we could find. Products sold as "research use only" have no FDA review of purity, sterility or dose, and are not for human use.

How much research is there on TB-500 fragment 17-23?

PubMed indexes 0 papers on TB-500 fragment 17-23 (0 tagged as clinical trials) as of October 19, 2026.

Who sells TB-500 fragment 17-23?

Bulk Peptide Supply, Eros Peptides, NuScience Peptides, Science.bio, Swiss Chems, Xcel Peptides listed it on their public catalogs when we checked; a listing is not an endorsement.

Related compounds

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