TB-500 is a synthetic peptide based on part of thymosin beta-4, a protein found in most human cells. It is not FDA approved, and human data is limited.
Also known as: Thymosin Beta-4 fragment.
Powder vials are usually labeled 2 mg, 5 mg or 10 mg.
Here is the math for a 5 mg vial mixed with 2 mL of bacteriostatic water, drawing 1 mg with a U-100 insulin syringe (1 mL = 100 units).
5 mg ÷ 2 mL = 2.5 mg/mL1 mg ÷ 2.5 mg/mL = 0.4 mL0.4 mL × 100 = 40 units| Amount | Volume | U-100 syringe |
|---|---|---|
| 500 mcg | 0.2 mL | 20 units |
| 1 mg | 0.4 mL | 40 units |
| 2 mg | 0.8 mL | 80 units |
Adding more water doesn't change how much TB-500 is in the vial. It only spreads it over more liquid, so each draw is bigger and easier to read.
| Water added | Concentration | Volume | U-100 syringe |
|---|---|---|---|
| 1 mL | 5 mg/mL | 0.2 mL | 20 units |
| 2 mL | 2.5 mg/mL | 0.4 mL | 40 units |
| 3 mL | 1.67 mg/mL | 0.6 mL | 60 units |
| 5 mL | 1 mg/mL | 1 mL | 100 units |
For any other vial size or amount, the free peptide reconstitution calculator works backwards from the amount you want and suggests a water volume that lands on a clean syringe mark.
There is no published human data for TB-500 by any route, so we do not list a half-life. The only human data is for full-length thymosin beta-4 given into a vein (half-life about 0.5 to 2 hours), which is a different molecule and route. The level curve in the app is an illustrative estimate, not a measured value.