Side by side
Thymosin Beta-4 vs Thymulin
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.
| Thymosin Beta-4 | Thymulin | |
|---|---|---|
| What it is | The full 43-amino-acid protein that TB-500 is a fragment of. It reached phase 2 trials in humans. TB-500 never has. | A genuine thymic hormone with real immunology behind it, and no clinical development. It only works with zinc bound to it, which is the most useful fact about it. |
| EvidenceHow much human evidence exists, not how well it works. | Clinical trials | Preclinical |
| Regulatory statusReviewed 2026-08-18 | 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. | Not approved for human use in any jurisdiction, and never taken into a registered clinical trial as a treatment. Its physiology is well documented; its therapeutic use is not. Sold only as a research chemical. |
| Routes | Subcutaneous, Topical | Subcutaneous |
| Cheapest per mgVials only, read from vendors' own listings and dated on the price index. | $5.00/mg | $2.00/mg |
| Median per mg | $5.25/mg | $4.00/mg |
| Vendors with a price | 2 | 3 |
| 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.