TB-500: What It Is, What the Research Says, and What You Need to Know

A naturally occurring peptide with strong evidence for tissue repair and inflammation reduction

Last updated: May 1, 2026

TB-500 is the synthetic version of a fragment of Thymosin Beta-4 (Tβ4) — a naturally occurring peptide found in high concentrations in blood platelets, wound fluid, and various tissues throughout the body.

Unlike many research peptides, Thymosin Beta-4 is an endogenous compound, meaning your body already produces it. TB-500 mimics the active region of this naturally occurring protein.

It has been used in veterinary medicine (particularly in horse racing) and is currently under investigation for human applications including cardiac repair.

• Human trials are underway for cardiac repair — Thymosin Beta-4 has shown promise in protecting heart muscle after myocardial infarction.
• Animal studies demonstrate significant acceleration of wound healing, muscle repair, and tendon recovery.
• Research shows anti-inflammatory effects in multiple animal models.
• Some studies show potential for hair follicle activation and hair regrowth.
• Veterinary use (especially in horses) provides a larger body of practical application data than most research peptides.

These reflect how researchers and research communities discuss this compound — not therapeutic recommendations.

• Muscle and tendon injury recovery research
• Cardiac repair investigation
• Wound healing studies
• Hair restoration research

Promotes actin polymerization, facilitates cell migration, modulates inflammation, and promotes angiogenesis — all of which are critical to tissue repair processes.