Side by side
TB-500 vs Thymosin Beta-4
Both are discussed for healing & recovery. What this site records about each, side by side. Every figure is on the compound's own page with the source it came from.
| TB-500 | Thymosin Beta-4 | |
|---|---|---|
| What it is | A synthetic fragment of thymosin beta-4, a naturally occurring protein involved in cell migration and tissue repair. Animal evidence only. | The full 43-amino-acid protein that TB-500 is a fragment of. It reached phase 2 trials in humans. TB-500 never has. |
| EvidenceHow much human evidence exists, not how well it works. | Preclinical | Clinical trials |
| Regulatory statusReviewed 2026-08-12 | Not approved for human use in the United States. Sold only as a research chemical, with no manufacturing standard behind that label. | Not approved anywhere. Reached phase 2 trials for ophthalmic and wound indications under pharmaceutical development, which did not proceed to registration. Sold as a research chemical, usually as the TB-500 fragment, not the full protein. |
| Routes | Subcutaneous, Intramuscular | Subcutaneous, Topical |
| Half-life | 2 hours | Not recorded |
| Cheapest per mgVials only, read from vendors' own listings and dated on the price index. | $1.20/mg | $5.00/mg |
| Median per mg | $6.00/mg | $5.25/mg |
| Vendors with a price | 40 | 2 |
| Storage once mixed | Refrigerated at 2–8 °C. Do not freeze once mixed. | Refrigerated at 2–8 °C. Do not freeze once mixed. |
Compare two other compounds · The full price index
This page is educational. It describes what published research reports, not what you should do. Peptides discussed here are largely not approved for human use, and nothing on BioAlmanac is medical advice. Nothing here ranks these two against each other. A table can show that one has more human evidence behind it or costs less per milligram; neither of those is a recommendation, and the right comparison for any person is one their doctor makes with them.