How Many Units Do I Draw for a Peptide Dose?

Units depend on three numbers: how many milligrams are in the vial, how many milliliters of bacteriostatic water you added when you mixed it, and how many micrograms you want in each dose. On a standard U-100 insulin syringe, 100 units equals 1 mL, so the unit number you draw is simply your dose volume converted into those syringe marks. The full path is: multiply the vial's milligrams by 1,000 to get its total micrograms, divide that by the milliliters of water to get micrograms per milliliter, divide your target dose by that concentration to get the milliliters you need, then multiply by 100 for the unit marks. The single most common beginner mistake is reading the milligram number on the vial as if it were the dose. That number is the total amount sealed in the whole vial, not what you draw at once.