TB-500 20mg Reconstitution: How Much Bacteriostatic Water & How Many Units
A 20mg vial of TB-500 contains 20,000 mcg. After you add bacteriostatic water, the amount of water decides the concentration — and therefore how many units you draw on a U-100 insulin syringe (1 ml = 100 units). The tables below cover the common water amounts.
Concentration by water amount
| Water added | Concentration | Per 1 unit (0.01 ml) | Per 10 units (0.1 ml) |
|---|---|---|---|
| 1 ml | 20 mg/ml | 200 mcg | 2 mg |
| 2 ml | 10 mg/ml | 100 mcg | 1 mg |
| 3 ml | 6.67 mg/ml | 66.67 mcg | 666.67 mcg |
How many units to draw
Example doses across the research range listed for TB-500 (2 mg–5 mg). Units are on a U-100 insulin syringe.
| Dose | With 1 ml | With 2 ml | With 3 ml | Doses per vial |
|---|---|---|---|---|
| 2 mg | 10 units | 20 units | 30 units | 10 |
| 3 mg | 15 units | 30 units | 45 units | 6 |
| 4 mg | 20 units | 40 units | 60 units | 5 |
| 5 mg | 25 units | 50 units | 75 units | 4 |
How to mix it
- Wipe the vial stoppers with alcohol and let them dry.
- Draw your chosen amount of bacteriostatic water into a sterile syringe.
- Inject the water slowly down the inside wall of the TB-500 vial — not directly onto the powder.
- Swirl gently until clear. Do not shake.
- Label the vial with the date and concentration, and store it in the refrigerator.
Full walkthrough: Peptide Reconstitution Guide · Injection Guide · TB-500 research profile
FAQ
How much bacteriostatic water do I add to a 20mg TB-500 vial?
Common choices are 1 ml, 2 ml, 3 ml. With 2 ml the concentration is 10 mg/ml. More water makes each dose a larger, easier-to-measure draw; less water keeps injection volume small. The amount of water does not change the dose — only how many units you draw.
How many units is 2 mg of TB-500 from a 20mg vial?
With 2 ml of bacteriostatic water, 2 mg is 20 units on a U-100 (1 ml) insulin syringe. See the table above for other water amounts.
How many doses are in a 20mg TB-500 vial?
At 2 mg per dose, a 20mg vial holds about 10 doses. At higher doses it holds fewer — see the table.