Retatrutide Reconstitution Calculator
Enter the amount you want to measure. The vial buttons will highlight which vial strengths create cleaner syringe-unit measurements.
What amount do you need?
Type the target amount, then choose mg or mcg. Example: 2mg or 500mcg.
Work the dose out from body weight
Syringe size:
Possible vial strengths:
Best Match
Good Match
Usable
Harder to Measure
Example Retatrutide Titration Schedule
| Phase | Weeks | Dose | Frequency |
|---|---|---|---|
| Start | Weeks 1–4 | 2 mg | 1× weekly |
| Titration 1 | Weeks 5–8 | 4 mg | 1× weekly |
| Titration 2 | Weeks 9–12 | 6 mg | 1× weekly |
| Titration 3 | Weeks 13–16 | 9 mg | 1× weekly |
| Target dose | Weeks 17+ | 12 mg | 1× weekly |
Investigational (Phase 3 TRIUMPH). All trials used once-weekly dosing only; daily protocols have never been studied.
Possible vial strengths:
What Is It?
Retatrutide
Triple agonist (GLP-1 / GIP / glucagon) in Phase 3 metabolic research.
Bacteriostatic Water
Sterile water containing a bacteriostatic preservative, commonly used when preparing multi-use research vials.
How To Mix Retatrutide
1
CleanUse alcohol swabs to clean the tops of both vials.
2
Draw BAC WaterDraw the selected amount of bacteriostatic water.
3
Inject SlowlyAdd the liquid slowly down the side of the vial.
4
Swirl GentlyDo not shake. Swirl gently until dissolved.
5
Store ProperlyStore as directed and protect from heat and light.
Best Practices & Common Mistakes
Best Practices
- Use sterile technique.
- Protect from light and heat.
- Store refrigerated when appropriate.
- Use clean syringe-unit math before measuring.
Common Mistakes
- Confusing milligrams with milliliters.
- Choosing an option with awkward decimal units.
- Using too little liquid for very small measurements.
- Shaking the vial aggressively.
Retatrutide Storage & Handling
Lyophilized Powder: −20°C (−4°F) for long-term storage (up to 24 months). Refrigeration 2–8°C (36–46°F) for short-term use (up to ~3 months). Original sealed vial in the freezer is safest.
Reconstituted Solution: 2–8°C (36–46°F), use within ~7–14 days. Keep sealed, avoid light, and do not repeat freeze-thaw cycles.
Reconstituted Solution: 2–8°C (36–46°F), use within ~7–14 days. Keep sealed, avoid light, and do not repeat freeze-thaw cycles.
Frequently Asked Questions
Any volume works — it just sets the concentration. 1 mL → 10 mg/mL; 2 mL → 5 mg/mL. More water means larger, easier-to-read syringe units; less water means smaller, harder-to-measure volumes. Pick the pairing the calculator marks as a "Best Match."
Swab both vial tops, draw your chosen amount of bacteriostatic water, add it slowly down the side of the powder vial, then swirl gently — never shake. Let it fully dissolve before measuring, then read the dose in syringe units (mL × 100 on a 1 mL insulin syringe).
Research used a once-weekly, gradually escalating schedule — roughly 2 mg → 4 mg → 6 mg over the first weeks, with higher steps in some study arms. These are the amounts studied in clinical trials, not a recommendation. Retatrutide is not approved, and dosing decisions belong with a licensed clinician.
Keep the mixed solution refrigerated at 2–8°C (36–46°F) and use within ~1–2 weeks. Sealed lyophilized powder stores longest frozen at −20°C. Protect from light and heat, and avoid repeated freeze-thaw cycles.
Retatrutide is a single molecule acting on all three receptors (GLP-1 / GIP / glucagon) at once, so activity isn't switched on at a specific milligram threshold — it scales with concentration. This is pharmacology context, not dosing advice.
Practical takeaway: If your goal involves weight management, metabolic health, recovery, physical performance, cognitive function, appearance, or general well-being, discuss it with a licensed healthcare professional. They can help you evaluate approved, evidence-based options rather than relying on an unapproved or investigational compound. This calculator is intended only for transparent research-reference calculations and does not determine an appropriate amount, recommend use, or replace professional medical guidance.
Important: This tool is for informational and research-reference purposes only. Not intended for human or veterinary use.