How peptide reconstitution works
Lyophilized (freeze-dried) peptides arrive as a powder. You reconstitute them by adding bacteriostatic water to the vial, which creates a solution at a known concentration (mg per mL). Your dose is then a small volume of that solution, measured in units on an insulin syringe. The math is simple but easy to get wrong — which is exactly what this calculator handles.
- Concentration = peptide (mg) ÷ BAC water (mL).
- Volume per dose = dose (mg) ÷ concentration.
- Syringe units = volume (mL) × 100 (on a U-100 insulin syringe).
More BAC water means a more dilute solution and more units per dose (easier to measure small doses precisely); less water means a concentrated solution and fewer units. Many people target a round, easy-to-draw number of units.
Don't want to do any of this?
Our managed plans take reconstitution off your plate entirely — we measure, mix, and seal a ready-to-dose pen cartridge in-lab and ship it to your door, dose-tracked. You never touch BAC water or do this math. See the managed plans →
Choosing a compound first? Compare the three big GLP-1s or browse the catalog.
For research use only. Not for human consumption. Nothing here is medical advice.