All products sold strictly for in vitro laboratory research use only · Not for human or animal administration · Not FDA-approved
Reconstitute a retatrutide vial and get the exact syringe draw for any research dose. Enter the vial strength, the bacteriostatic water you added, and your target dose. Need a general tool for other compounds? Use the peptide reconstitution calculator.
How it works: Vial strength ÷ BAC water = concentration. Target dose ÷ concentration = draw volume. 1 mL on a U-100 insulin syringe = 100 tick marks.
Amounts cited in published retatrutide research, shown as a gradual escalation with each step held for several weeks before increasing. Provided for scientific context only. Tap a row to load that weekly amount into the calculator.
| Phase | Weekly Amount | Typical Duration |
|---|
Retatrutide ships as a lyophilized (freeze-dried) powder and must be reconstituted with bacteriostatic water before any research draw can be measured. The amount of powder in the vial is fixed, but the concentration you end up with depends entirely on how much bacteriostatic water you add. Add more water and each unit on the syringe carries less compound; add less water and each unit carries more. This calculator removes the arithmetic: enter the vial strength printed on your retatrutide vial, the volume of bacteriostatic water you drew in, and your target research dose, and it returns the exact tick mark to draw to on a U-100, U-50, or U-30 insulin syringe.
For a full walkthrough of the reconstitution procedure itself, see our step-by-step guide to reconstituting research peptides. For storage and shelf-life once reconstituted, see how long peptides last. Every retatrutide batch we supply ships with a public certificate of analysis documenting HPLC purity and mass-spec identity.
Divide the vial strength in micrograms by the volume of bacteriostatic water added to get the concentration in mcg/mL. Divide your target dose by that concentration to get the draw volume in mL. On a U-100 insulin syringe, 1 mL equals 100 tick marks, so multiply the draw volume by 100 to get the units to draw to. The calculator above does this automatically.
There is no single correct volume. More bacteriostatic water gives a lower concentration and a larger, easier-to-read draw; less water gives a higher concentration and a smaller draw. Common research reconstitutions use 1 to 3 mL per vial. Enter your chosen volume above to see the exact draw for your target dose.
Published retatrutide studies commonly escalate the weekly amount gradually over several weeks, for example beginning around 2 mg per week and stepping up through 4 mg and 8 mg toward a higher maintenance amount, holding each step for several weeks before increasing. The reference table on this page reflects amounts cited in the literature and is for scientific context only, not a dosing recommendation.
No. Retatrutide is sold strictly for in vitro laboratory research use only and is not approved for human or animal use. This is a unit-conversion reference tool for qualified researchers and does not recommend or provide guidance for administration to humans or animals.
FOR RESEARCH USE ONLY. This calculator is a reference tool for qualified laboratory researchers. Lone Star Peptide Co. makes no representations regarding dosing for human or veterinary use. Retatrutide is sold strictly for in vitro and laboratory research applications and is not FDA-approved for human consumption or therapeutic use. Titration amounts shown are drawn from published research literature and are provided for scientific context only.