TB-500
Also known as: thymosin b4, tb4, tb 500, TB500, Thymosin Beta-4 Fragment, Ac-LKKTETQ
TB-500 is a synthetic peptide based on a region of thymosin beta-4, a naturally occurring peptide encoded by the TMSB4X gene (WHO name "timbetasin").
Caliber Peptide Index tracks TB-500 across 41 research-peptide vendors, with the lowest listed price at $2.97/mg (30mg) at Purehealthpeptides as of 2026-06-03. Prices below are normalized to dollars per milligram so different vial sizes can be compared on an equal basis. TB-500 is sold by third-party vendors for research use only.
Research Applications
Studied in research on actin-binding and tissue-related signaling pathways.
Safety Considerations
Not an approved human therapeutic. Sold as a research chemical for laboratory use only — not for human consumption.
Sources
Available From 41 Vendors — Sorted by $/mg
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Frequently asked
- How many vendors sell TB-500?
- Caliber Peptide Index currently tracks 41 research peptide vendors listing TB-500.
- What is the lowest tracked price for TB-500?
- The lowest tracked price for TB-500 is $2.97/mg (30mg) at Purehealthpeptides. Prices are sorted by dollars per milligram so different vial sizes can be compared on an equal basis.
- How often are TB-500 prices updated?
- Vendor prices are refreshed by our automated scraper (most recent update: 2026-06-03). Always confirm the current price on the vendor's site before purchase.
Caliber Peptide Index is a directory. We do not test, score, or endorse any vendor. Prices listed are what each vendor publishes; verify on the vendor's site before purchase.
Products listed for research purposes only — not for human consumption. Wiki content is summarized from publicly available research literature and is not medical advice.