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The TB-500 guideUnderstand. Check. Ask. Bring your questions

Prepare your questions

Questions to take to your care visit

Pick the questions you want to bring. Read them on screen or keep a copy for the visit.

In the US, medicines are reviewed by the Food and Drug Administration, known as the FDA.

Build your visit list

Start with what is being proposed

Ask for a clear name, a clear reason, and the evidence for that reason.

Ask how the care would work

Choose the details you want resolved before making a care decision.

Keep these facts beside the questions

They explain why the name and evidence questions matter.

  • As of September 2026, TB-500 has no US FDA approval and no published human study identified by the FDA.
  • FDA reviewers say TB-500 and the whole thymosin beta-4 protein are different substances. They also warn that different versions of an ingredient may be sold under the same TB-500 name.

Notes for this chapter

  1. FDA · Review of the fragment and its evidence
  2. FDA · Drug application records