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Recovery & Repair · Thymosin beta-4 fragment (research)

TB-500 (Thymosin Beta-4)

Research use · ships internationally
$45.00 / 5mg vial
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TB-500 (Thymosin Beta-4) reference vial
Drug class
Thymosin beta-4 fragment (research)
Status
Compounded (503A)
Also known as
Thymosin beta-4, Tβ4, TMSB4X
Reviewed
2026-06-01 · Kindr Health Clinical Team

What TB-500 (Thymosin Beta-4) is studied for

  • Soft-tissue and tendon repair (preclinical)
  • Cardiac tissue regeneration research
  • Wound healing and corneal repair
  • Flexibility and muscle recovery

Mechanism of action

Thymosin beta-4 sequesters G-actin, regulating cell migration, angiogenesis, and stem-cell recruitment to injury sites. The TB-500 fragment is a long-acting analog used in animal research.

Frequently asked questions

Is TB-500 the same as thymosin beta-4?

TB-500 is a synthetic fragment of the same active region; full-length thymosin beta-4 (RGN-352) has been studied in human cardiac trials. They are commonly used interchangeably in research.

Why is it banned in equine sport?

WADA and most horse-racing authorities ban TB-500 because of its performance-enhancement and healing potential, even though human clinical evidence is preliminary.

How is it dosed in research?

Subcutaneous injection; protocols vary widely. No validated human therapeutic dose exists.

Is it safe?

Short-term tolerability appears good in animals; long-term human safety is unknown. Theoretical risks include angiogenic effects with cancer history.

Add to cart · International research catalogBuy TB-500 (Thymosin Beta-4) in the kindr Peptides Shop →
Frequently stacked with · Save 15%

Build the TB-500 (Thymosin Beta-4) protocol stack

Research protocols commonly pair TB-500 (Thymosin Beta-4) with the peptides below. Add all three vials to unlock the bundle discount at checkout.

This peptide
TB-500 (Thymosin Beta-4)
$45.00
+ Add
BPC-157
Tendon, ligament, gut, and connective-tissue support.
$33.00
+ Add
GHK-Cu
Copper peptide for collagen remodeling and follicular support.
$40.00
$118.00 $100.30
You save $17.70 on the stack
Add all 3 to cart →

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Research & medical disclosure. This page is educational reference content reviewed by a licensed physician. It is not medical advice and does not establish a clinician–patient relationship. Peptides offered on the kindr Peptides Shop are sold for in vitro laboratory research purposes only and ship worldwide, including the United States. For U.S. clinical care, use the kindr Longevity intake.