Written by Dr. Jeffrey Peng, MD — Board-Certified Sports Medicine Physician Published: March 1, 2026 | Last Updated: March 1, 2026 TB-500 is one of the most talked-about peptides in the world of injury recovery. Marketed as a synthetic version of a naturally occurring protein called thymosin beta-4, it has gained attention for its purported ability to accelerate healing, reduce inflammation, and support tissue repair in muscles, tendons, and joints. For patients dealing with