Reading an insulin syringe

U-100 insulin syringes measure volume: 100 units = 1 mL, so 1 unit = 0.01 mL. A unit is not a dose. How many mcg are in a unit depends on how much water went into the vial, so the same peptide mixed differently needs a different number of units. Always use the units the app shows for your vial.

• 0.3 mL syringe: holds 30 units, usually marked every half unit. Best for small doses.
• 0.5 mL syringe: 50 units, marked every unit.
• 1 mL syringe: 100 units, marked every 2 units on many brands (some mark every unit).

Read the dose at the flat top edge of the black rubber plunger (the edge nearest the needle), not at the tip of its cone.

1. 1Pull a little past your dose.
2. 2Hold the syringe needle-up and flick it so bubbles rise.
3. 3Push the air out and stop exactly on your mark.

"IU" (international units, used for hGH and hCG) is a different thing: a measure of strength, not volume. The app keeps them apart.

Go with this guide