PeptideSearch

TB-500

Animal studies only

Almost all the research is in animals. We do not know if the same thing happens in people.

Also called Thymosin Beta-4 fragment / TB4 frag 17-23

A fragment of a natural protein studied for wound repair and cell movement, mostly in animals. There is no approved human use.

The basics

What is it?
A short piece of a natural body protein called thymosin beta-4, which helps cells move around.
What do we know?
In animals, it seems to help cells move into damaged areas, which is part of how wounds close.
What do we still not know?
Whether any of that happens in people. Human studies are missing.

Can a doctor prescribe this?

No. It sits on a restricted list, so pharmacies are not allowed to make it.

The FDA has not approved this as a medicine.

Not FDA approved and placed in the restricted category for 503A compounding.

Official status: Category 2 – restricted from compounding. Checked 2026-06-30.

Lab suppliers we list: 16

Doses used in research

Taken word for word from the studies and trials listed on this page. This is not a recommendation and not a dose for anyone to take.

In animal studies

These are doses given to animals, usually per kilogram of body weight. They do not convert directly to a human dose.