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Recovery & Repair · Research use only

TB-500

Thymosin Beta-4 fragment

A synthetic version of a region of Thymosin Beta-4, a protein naturally present in nearly all cells. Frequently researched alongside BPC-157.

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Peptides Express TB-500 vial — 5 mg
In stock · Lab-tested · COA

TB-500

5 mg
$50 / vial
Single vial · research grade
1
No payment online — held for 48 hours, pay when you pick up. Prefer a person? Call or text (559) 939-5274.
In stock · Lab-tested · COA on every batch

Order TB-500 direct from Peptides Express

TB-500 and our full lineup are stocked locally and lab-tested with a COA on every batch. Reserve online for pickup, walk in, call, or text. Fresno's premium-grade research peptides, stocked locally. Research use only.

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Local pickup at Peptides Express · 6592 N. First Street, Fresno, CA 93710

Products are sold strictly for laboratory and research purposes — not for human consumption.

What the research says

TB-500 is based on the active region of Thymosin Beta-4, a protein involved in actin regulation — a building block of cell structure and movement. In research models it is studied for cell migration, flexibility of connective tissue, and systemic (whole-body) recovery signaling.

Where BPC-157 is often described in research as more localized, TB-500 is studied for broader, systemic distribution. The two are frequently investigated together in the literature and in the research community, which is why blends exist.

As with the whole category, the published evidence is largely preclinical. Purity and third-party COAs are the deciding factor between a research-grade source and a gray-market one.

For research use only. TB-500 is referenced here strictly for laboratory and research purposes — not for human consumption, and not as medical advice, diagnosis, or treatment. Nothing on this page claims any effect in humans.
Researched for

What studies investigate

  • ◆Cell migration & actin regulation
  • ◆Systemic recovery signaling
  • ◆Connective-tissue flexibility models
  • ◆Endurance & recovery research
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Keep researching

Related compounds.

Recovery & Repair

BPC-157

The most-searched peptide on earth.

Read the guide →Recovery & Repair

GHK-Cu

The copper peptide behind the skin & repair research.

Read the guide →Recovery & Repair

BPC-157 / TB-500 Blend

The two most-researched recovery peptides, together.

Read the guide →
Quality you can verify

Pharmaceutical-grade. Twice-tested. Documented.

Every batch is produced to a pharmaceutical-grade standard, verified by in-house and independent third-party testing, and shipped with a batch-specific certificate of analysis — backed by a 100% satisfaction guarantee. Here's exactly what that means, in plain English.

Standards

Pharmaceutical Grade

What the term really means — and what it doesn't claim.

Learn → Testing

Quality & Testing

HPLC purity, mass-spec identity, third-party verified.

Learn → Documentation

How to Read a COA

Read the receipt that proves what's in the vial.

Learn → Transparency

Research Use Only

What it covers, stated plainly.

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