Reviewed by Michael Willner, PharmD, MSCP · Updated November 2026
TB-500 usually comes up in the same breath as BPC-157, especially among athletes and anyone nursing a stubborn soft-tissue injury. Here’s a pharmacist’s plain-English rundown.
What is TB-500?
TB-500 is a small synthetic peptide based on a piece of thymosin beta-4, a protein your body makes naturally. Thymosin beta-4 helps cells move and organize their internal scaffolding, which is why it shows up in wound and tissue repair research.
One important detail: TB-500 is a fragment, not the whole protein. Research on full thymosin beta-4 doesn’t automatically apply to TB-500.
What does the research say?
Most of what we know comes from animal and veterinary studies, where TB-500 is studied for soft-tissue and wound recovery. Early human research on the full thymosin beta-4 protein has focused on eye and heart conditions. Controlled human trials of TB-500 itself are very limited, and none have reached the large late-stage trials that FDA approval requires.
The bottom line: TB-500 is studied for soft-tissue recovery, and the human evidence is still early.
Is TB-500 legal in Texas?
As of October 2026, licensed pharmacies can compound TB-500 under strict conditions. The U.S. Department of Health and Human Services published an interim policy on October 30, 2026, covering six peptides, including TB-500, for injection under the skin or into muscle.
The product must come from an FDA-registered source with a certificate of analysis, contain only one active ingredient, and be dispensed for a specific patient with a prescription. This is not FDA approval, and the policy could change.
What about BPC-157 and TB-500 together?
You’ve probably seen “recovery blends” that combine the two in one vial. The current HHS policy allows only one active ingredient per product, so blends aren’t covered. If your provider wants you on both, they’re prescribed and dispensed as separate vials.
Who should not use TB-500?
Check with your provider, but TB-500 generally isn’t for you if you:
- Are pregnant or breastfeeding
- Have active or recent cancer
- Are under 18
- Compete in tested sports. TB-500 is banned by the World Anti-Doping Agency at all times.
How to get TB-500 at Medrocs
- Talk with your provider, or request a virtual appointment through us.
- Your provider sends a prescription to Medrocs Pharmacy.
- We fill it through our licensed sterile compounding partner and teach you how to use it in person.
- Your pharmacist checks in to see how it’s going.
Frequently Asked Questions
Is TB-500 the same as thymosin beta-4?
Is TB-500 FDA-approved?
Do I need a prescription?
Does Medrocs compound these peptides?
Can you ship outside Texas?
This article is for education only and isn’t medical advice. Compounded medications are not FDA-approved. Talk with your provider about whether any treatment is right for you.