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Not FDA approvedalso known as Thymosin Beta-4 fragmentalso known as TB4

TB-500

The Sidekick

BPC-157's plus-one at every recovery party.

Last medically reviewed: June 2026

TB-500's video intro is coming soon

Pep and Peri are filming this one. Check back, or join the community to catch it first.

What I look like

The form and how it is used

Another white powder in a vial, mixed and injected. Rarely shows up alone, it is usually invited along with BPC-157.

My story

Where I came from

TB-500 is based on a naturally occurring repair protein your body already makes in small amounts. Because it and BPC-157 both wear the recovery badge, they get stacked together constantly.

What I bring to the table

What people explore me for

  • Explored for tissue repair and recovery
  • Talked about for flexibility and mobility
  • Of interest for healing support alongside BPC-157

My red flags

Side effects and cautions to know

  • Very little human research exists
  • Anecdotal reports of fatigue and head-rush feelings
  • Banned in competitive sport
  • Unregulated sourcing means unknown quality

Where to find me

The honest version, not a shopping guide

Not approved for human use and sold in the same gray research-chemical market as its partner. No vendor can promise you safety or purity. A licensed provider is the only sensible place to take questions about it.