TB-500, single vial

Synthetic actin-binding peptide fragment

TB-500

Synthetic actin-binding peptide fragment. Supplied for laboratory research use only.

  • 7-amino-acid fragment of thymosin beta-4, not the same molecule
  • No controlled human trial of TB-500 itself exists
  • PCAC voted 8-6 to recommend compounding list, July 2026
  • Supplied for laboratory research use only. Not for human or veterinary use.
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Research use only. Not for human or veterinary use or consumption. This product is not approved by the FDA and is not intended to diagnose, treat, cure or prevent any disease.

What it is
CompoundTB-500, also designated Thymosin Beta-4 fragment (residues 17-23)
ClassSynthetic actin-binding peptide fragment
FormLyophilised powder, supplied in a vial
OriginatorNot stated
Development status

TB-500 is not approved by the FDA for any indication.

Development status is stated above. No efficacy claim is made on this page.

Shipping & returns
ReturnsNinety days from delivery. Contact us and we will refund the purchase price.
TB-500 $239.99

The specifics

The details, if you want them.

Also known asThymosin Beta-4 fragment (Ac-LKKTETQ, residues 17-23)
ClassSynthetic actin-binding peptide fragment
Amino acids7
Trial statusNo controlled human clinical trials of TB-500 itself exist
FormLyophilised powder
Receptor target(s)G-actin (actin-sequestering activity)

Development

Where it is up to.

No human clinical trial of TB-500 itself exists. The separate, full-length molecule thymosin beta-4 has its own distinct trial history — not evidence for TB-500.

Questions

The questions people actually ask.

What is TB-500?
A synthetic 7-amino-acid fragment of the larger protein thymosin beta-4 — a distinct, shorter molecule.
Is TB-500 the same as thymosin beta-4?
No. TB-500 is a small fragment; thymosin beta-4 is the full 43-amino-acid protein with its own separate trial history. Data for one shouldn't be assumed to apply to the other.
What does "Research Use Only" mean?
Research Use Only means exactly that: intended for laboratory and research settings only, not for human or animal use, consumption, diagnosis, treatment, cure, or prevention of any disease.
How is TB-500 supplied?
As a vial of lyophilised (freeze-dried) powder, sold for laboratory and research use only.
What is your refund policy?
Ninety days from delivery. If you decide against it inside that window, contact hello@getmrpeps.com and we will refund the purchase price. Damaged or incorrect orders are replaced or refunded regardless.