Peptide LibraryTB-500 calculator
TB-500 is a seven-residue fragment (17–23) of thymosin beta-4, not the full 43-residue protein, so the thymosin beta-4 literature is not dosing evidence for it. It has no established human dose: its one registered human trial is still recruiting and has not disclosed a dose. Most vendors sell a 10 mg vial, some a 5 mg one. The calculator and tables turn a vial and a water volume into a concentration; they do not supply an amount.
Full research profile: TB-500. For any other concentration, use the insulin syringe units converter.
For research use only. Not medical advice. This page does arithmetic; it does not recommend an amount.
TB-500 reconstitution chart
Concentration and micrograms per mark on a U-100 insulin syringe, by vial size and water added. The peptide amount never changes; only how concentrated it is.
| Vial | + 1 mL water | + 2 mL water | + 3 mL water |
|---|---|---|---|
| 5 mg | 5 mg/mL · 50 mcg per unit | 2.5 mg/mL · 25 mcg per unit | 1.67 mg/mL · 16.7 mcg per unit |
| 10 mg | 10 mg/mL · 100 mcg per unit | 5 mg/mL · 50 mcg per unit | 3.33 mg/mL · 33.3 mcg per unit |
Most-listed TB-500 vial sizes across vendors we track: 10 mg (29 vendors), 5 mg (10 vendors), 20 mg (2 vendors), 0.5 mg (1 vendor). Compare prices.
Why there is no dose table
No human dose of TB-500 is established by a published trial, so this page shows concentrations only. The dosage section of the TB-500 profile lists what the literature does and does not report, with sources.
Common questions
How much bacteriostatic water do you add to a 10 mg TB-500 vial?
There is no single correct volume: the amount of peptide is fixed and the water only sets the concentration. For 10 mg, 1 mL gives 10 mg/mL (100 mcg per unit), 2 mL gives 5 mg/mL (50 mcg per unit) and 3 mL gives 3.33 mg/mL (33.3 mcg per unit). More water makes each syringe mark hold less, which makes small amounts easier to measure accurately.
What dose does the TB-500 calculator use?
None. No human dose of TB-500 is established, so the calculator does not suggest one. It converts a vial size, a water volume and an amount you enter into a volume and syringe units; the tables on this page show concentrations only.
What does one unit on an insulin syringe mean?
A unit is a volume mark, not an amount of drug. On a U-100 syringe 100 units fill 1 mL, so 10 units is always 0.1 mL; how much peptide those 10 units hold depends only on the concentration you mixed. U-40 syringes use 40 marks per mL, so the same volume reads as a different number of units.