How to Mix Retatrutide
Reconstitution Guide: BAC Water Ratio & Dosing Chart
Always consult a healthcare professional before starting any injection protocol.
Why Reconstitution Matters
Retatrutide is supplied as a freeze-dried powder and must be reconstituted with bacteriostatic water (BAC water) before it can be injected. Because Retatrutide is a potent triple agonist, an incorrect mixing ratio can significantly over- or under-dose you — always double-check the ratio below before drawing your dose.
📊 Reconstitution Ratio
| Vial Size | BAC Water Added | Final Concentration |
|---|---|---|
| 10mg vial | 1.0ml | 10mg/ml (100 units = 10mg) |
🧪 Step-by-Step Mixing Instructions
Wash your hands
Wash thoroughly with soap and water for at least 20 seconds and dry with a clean towel.
Swab both vial tops
Clean the rubber stopper on your Retatrutide vial and your BAC water vial with a fresh alcohol swab each. Let air-dry for 10 seconds.
Draw 1.0ml of BAC water
Using a syringe, draw exactly 1.0ml of bacteriostatic water from its vial.
Inject slowly down the vial wall
Angle the needle so the water runs down the inside of the glass onto the powder — do not squirt it directly onto the powder.
Check the solution is clear
It should be clear and colourless with no particles. Discard if cloudy or discoloured.
Label and refrigerate
Write the mixing date on the vial. Store at 2–8°C and use within 28 days.
📅 Dose to Unit Conversion (10mg vial, 1.0ml BAC)
| Dose | Units (U-100) | Volume |
|---|---|---|
| 2.0mg | 20 Units | 0.20ml |
| 4.0mg | 40 Units | 0.40ml |
| 8.0mg | 80 Units | 0.80ml |
| 12.0mg | 120 Units | 1.20ml |
Retatrutide Mixing FAQs
How much BAC water do I add to a Retatrutide vial?
Add 1.0ml of bacteriostatic water to a 10mg vial, giving a 10mg/ml concentration — 100 units on a U-100 syringe equals 1.0ml equals 10mg.
Can I use sterile water instead of BAC water?
No. Sterile water has no preservative and the solution must be used immediately. Bacteriostatic water allows fridge storage for up to 28 days.
Why does Retatrutide need such careful mixing?
As a triple GLP-1/GIP/glucagon agonist, Retatrutide is potent even at low doses. An inaccurate BAC water ratio changes the concentration and can significantly alter the actual mg dose delivered — always measure precisely.
How long does mixed Retatrutide last?
Once reconstituted, store in the fridge at 2–8°C and use within 28 days. Label the vial with the mixing date.