Enter how much peptide is in the vial, how much bacteriostatic water you’re adding, and your target research dose. You’ll get the exact volume to draw in U-100 insulin-syringe units, the resulting concentration, and how many doses the vial holds.
Reconstitution is just a concentration problem. When you dissolve a lyophilized peptide in bacteriostatic water, the concentration is the peptide amount divided by the water volume:
Concentration (mg/mL) = peptide in vial (mg) ÷ water added (mL). Multiply by 1000 to get mcg/mL.
To find the volume for a target dose, divide the dose by the concentration. On a U-100 insulin syringe, every 0.01 mL equals 1 unit, so multiplying the volume in mL by 100 gives the units to draw:
Volume (mL) = dose (mcg) ÷ concentration (mcg/mL) • Units (U-100) = volume (mL) × 100
A 10 mg vial reconstituted with 2 mL of water gives 5 mg/mL, or 5000 mcg/mL. For a 250 mcg target dose: 250 ÷ 5000 = 0.05 mL = 5 units. The vial holds 10,000 mcg ÷ 250 = 40 doses.
Read the full reconstitution guide →