No FDA-approved product
TB-500
Also called thymosin beta-4 fragment, LKKTETQ.
TB-500 has no FDA-approved product. This page cites 1 source, and the strongest evidence comes from animal studies.
- Status
- No FDA-approved product
- Form
- Injection
- Half-life
- Not modeled
- Strongest evidence
- Animal studies
- Cited claims
- 1
- Last updated
- November 6, 2026
What the evidence says
Each claim names the kind of study behind it, what it can't tell you, and where it comes from.
Animal studies
Wound healing and tissue repair improved in animal studies of thymosin beta-4, the peptide related to TB-500.
Limits: These experiments used full-length thymosin beta-4, not the LKKTETQ fragment sold as TB-500. They do not establish that TB-500 helps or is safe in people.
Regulatory status
United States
Not an FDA-approved medicine. FDA identifies this name with the thymosin beta-4 fragment LKKTETQ. The cited FDA assessment identified no human exposure data for this fragment.