TB-500 is a synthetic peptide, a fragment of the natural protein Thymosin Beta-4, known for its claimed ability to promote tissue repair, wound healing, muscle growth, and reduce inflammation by interacting with actin and supporting cell migration, though often sold online for unapproved uses, leading to concerns about purity and regulation. It’s used in bodybuilding and performance enhancement circles for recovery and tissue repair but lacks FDA/EMA approval, with research focused on its parent molecule’s functions and detection as a doping agent in sports.

What it is

A synthetic peptide: TB-500 mimics the active part (amino acids 17-23) of Thymosin Beta-4 (Tβ4).
Derived from natural protein: Tβ4 is an endogenous protein involved in cellular repair, development, and immune response

Claimed benefits (often from users/sellers)

Accelerated wound healing and tissue repair.
Reduced inflammation.
Improved muscle growth and flexibility.
Promotes new blood vessel formation (angiogenesis).

Usage & concerns

Unapproved product: It’s sold online without FDA/EMA approval, raising quality and safety concerns.
Doping: Used by athletes for performance, it’s a banned substance in sports, with anti-doping agencies developing detection methods.
Not for humans (officially): Often sold as a veterinary product or research chemical, despite being marketed for human use.