Retatrutide (GLP3-RT) 40mg Reconstitution: How Much Bacteriostatic Water & How Many Units
A 40mg vial of Retatrutide (GLP3-RT) contains 40,000 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) |
|---|---|---|---|
| 2 ml | 20 mg/ml | 200 mcg | 2 mg |
| 3 ml | 13.33 mg/ml | 133.33 mcg | 1.33 mg |
| 5 ml | 8 mg/ml | 80 mcg | 800 mcg |
How many units to draw
Example doses across the research range listed for Retatrutide (GLP3-RT) (1 mg–12 mg). Units are on a U-100 insulin syringe.
| Dose | With 2 ml | With 3 ml | With 5 ml | Doses per vial |
|---|---|---|---|---|
| 1 mg | 5 units | 7.5 units | 12.5 units | 40 |
| 5 mg | 25 units | 37.5 units | 62.5 units | 8 |
| 8 mg | 40 units | 60 units | 100 units | 5 |
| 12 mg | 60 units | 90 units | 150 units (over 1 ml — split or use a larger syringe) | 3 |
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 Retatrutide (GLP3-RT) 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 · Retatrutide (GLP3-RT) research profile
FAQ
How much bacteriostatic water do I add to a 40mg Retatrutide (GLP3-RT) vial?
Common choices are 2 ml, 3 ml, 5 ml. With 3 ml the concentration is 13.33 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 1 mg of Retatrutide (GLP3-RT) from a 40mg vial?
With 3 ml of bacteriostatic water, 1 mg is 7.5 units on a U-100 (1 ml) insulin syringe. See the table above for other water amounts.
How many doses are in a 40mg Retatrutide (GLP3-RT) vial?
At 1 mg per dose, a 40mg vial holds about 40 doses. At higher doses it holds fewer — see the table.