TB-500 (Thymosin Beta-4) Dosage Guide: Reported Ranges, Units & Reconstitution
Reported TB-500 (Thymosin Beta-4) study arms, mg-to-insulin-unit conversion tables, reconstitution volumes and handling notes.
By PX1 Research Team · August 4, 2026
TB-500 (Thymosin Beta-4) amounts reported in the literature
TB-500 (Thymosin Beta-4) is a synthetic fragment of thymosin beta-4 studied in actin-binding and repair-model research. The table below summarizes the arms described in published protocols. It is a literature reference, not a protocol to follow.
| Study arm | Reported amount | Cadence |
|---|---|---|
| Loading arm | 2–2.5 mg | twice weekly × 4–6 weeks |
| Maintenance arm | 2 mg | weekly |
Concentration math
Standard preparation: 10 mg + 2 mL = 5 mg/mL. On a U-100 insulin syringe, 100 units = 1 mL, so:
| Concentration | 0.5 mg | 1 mg | 2 mg | 5 mg |
|---|---|---|---|---|
| 2.5 mg/mL | 20 units | 40 units | 80 units | — |
| 5 mg/mL | 10 units | 20 units | 40 units | 100 units |
| 10 mg/mL | 5 units | 10 units | 20 units | 50 units |
Change the diluent volume and every number changes proportionally. The peptide calculator does the conversion for any vial size and target amount.
Why escalation intervals in the literature are long
Across published protocols in this class, step-ups are spaced in multi-week blocks rather than compressed. Study designs prioritize tolerability data at each level before advancing, which is why the reported schedules look conservative compared to what circulates informally.
Handling notes specific to TB-500 (Thymosin Beta-4)
| Property | Detail |
|---|---|
| Compound | TB-500 (Thymosin Beta-4) |
| Class | synthetic fragment of thymosin beta-4 |
| Molecular weight | 4963 g/mol |
| Reported half-life | ~2–3 days |
| Vial sizes | 10 mg |
| Purity | ≥99% HPLC · LC-MS identity · COA per lot |
| Form | Lyophilized powder |
Reconstituted material belongs at 2–8 °C with a 28-day in-use window using bacteriostatic water. Use a fresh needle for each draw and never re-enter a vial with a used tip.
Documentation
PX1 publishes HPLC purity, LC-MS identity and endotoxin data per lot at /coa. Product page: TB-500 (Thymosin Beta-4).
Research use only. PX1 Research supplies compounds for laboratory and in-vitro research. Nothing here is medical advice, a dosing recommendation, or an offer for human or veterinary use. Figures cited are reported from published laboratory literature.