Get the names straight.
A similar name can make very different research sound like the same thing. Get that difference clear before reading a treatment claim.
The short version
A small piece, made in a lab.
A peptide links the small parts found in proteins into a short chain.
Proteins are longer chains that do jobs in the body, such as helping cells move.
TB-500 joins 7 of these parts in a lab, with a small extra chemical piece attached at one end.
The added piece is part of the substance itself. It may change how the substance behaves, so a study of a piece without it is not a study of TB-500.
It copies a piece of thymosin beta-4, a natural protein with 43 parts.
Read the difference
The piece is not the whole protein.
The Food and Drug Administration, called FDA, says TB-500 and thymosin beta-4 are different substances.
The full protein occurs in the body. To make TB-500, a lab joins the smaller chain’s parts.
A result from the full protein cannot simply be transferred to TB-500.
Which substance did the study use?
In September 2026, the checked FDA review contained no published study giving TB-500 to people.
Most human trials of full thymosin beta-4 involved drops for the eyes or gel for the skin.
When someone shows you a paper, ask them to point to the exact substance and the way it was used.