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| Field | Last updated |
|---|---|
| Aliases | Thymosin beta-4 fragment, TB500, LKKTETQ fragment, Tβ4 fragment |
| Category | Healing & Repair |
| Formula | C₃₈H₆₆N₁₀O₁₁ |
| Molecular weight | 862.96 Da |
| Half-life | ~few minutes (LKKTETQ fragment; full Tβ4 is ~hours) |
| Mechanism (summary) | TB-500 — as flagged by the FDA — refers specifically to the thymosin beta-4 fragment LKKTETQ, not full-length thymosin beta-4. The two are frequently conflated in marketing material, but the FDA states it lacks human exposure data for fragment-containing drug products. No approved human medicine exists. |
| Dosing notes | No approved or standardized human dosing for TB-500 fragment. Published thymosin beta-4 studies used investigational topical wound regimens — not interchangeable with off-label injected TB-500. |
| Storage |
No approved, standardized human TB-500 drug product is identified in the FDA material reviewed, so no single authoritative label storage instruction can be quoted. Storage is formulation-specific and should follow exact investigational or supplier documentation. |
| Read more | Full reference → |
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