Retatrutide Dosage & Reconstitution Calculator
Calculate exact syringe units, reconstitution volume, and concentration for retatrutide research vials.
How to Use the Retatrutide Dosage & Reconstitution Calculator
Retatrutide is an investigational triple-hormone receptor agonist targeting GLP-1, GIP, and glucagon receptors. Because research peptides are shipped as lyophilized (freeze-dried) powder to maintain molecular stability during transit, researchers must reconstitute the compound using sterile bacteriostatic water before conducting volumetric aliquoting.
Formula and Calculation Methodology
- Vial mg: Lyophilized powder weight contained within the sealed glass vial
- Water mL: Volume of Bacteriostatic Water (0.9% benzyl alcohol) injected for reconstitution
- Dose mg: Target protocol mass required for the application
- U-100 Standard: 100 units on a standard U-100 insulin syringe equals exactly 1.0 mL
When reconstituting peptide vials, precision math is critical to avoid measurement error. Syringes calibrated in insulin units (U-100) measure volume where 100 units corresponds to 1.0 milliliter. Injecting bacteriostatic water slowly along the glass wall preserves fragile peptide chains, followed by gentle swirling rather than vigorous shaking.
Retatrutide Reconstitution & Syringe Units Quick-Reference Matrix
| Vial Size | BAC Water Added | Vial Concentration | 1 mg Dose | 2 mg Dose | 4 mg Dose |
|---|---|---|---|---|---|
| 5 mg | 1.0 mL | 5.0 mg/mL | 20 Units | 40 Units | 80 Units |
| 5 mg | 2.0 mL | 2.5 mg/mL | 40 Units | 80 Units | — |
| 10 mg | 2.0 mL | 5.0 mg/mL | 20 Units | 40 Units | 80 Units |
| 10 mg | 2.5 mL | 4.0 mg/mL | 25 Units | 50 Units | 100 Units |
| 15 mg | 3.0 mL | 5.0 mg/mL | 20 Units | 40 Units | 80 Units |
| 20 mg | 2.0 mL | 10.0 mg/mL | 10 Units | 20 Units | 40 Units |
Frequently Asked Questions
Why is bacteriostatic water used instead of sterile water?
Bacteriostatic water contains 0.9% benzyl alcohol as a bacteriostatic preservative, inhibiting microbial growth and allowing multi-dose usage over 28 to 30 days when refrigerated.
How long does reconstituted retatrutide last?
Reconstituted peptides should be kept refrigerated at 2°C to 8°C (36°F to 46°F) and shielded from light. Most research guidelines recommend utilization within 4 weeks.
What happens if my dose calculation exceeds 100 units?
If your calculated dose exceeds 100 units (1.0 mL), the volume is too large for a standard U-100 syringe. Reconstitute the next vial with less bacteriostatic water to increase peptide concentration.