reading bacteriostatic water threads from 2024 and half of it aged badly
reading bacteriostatic water threads from 2024 and half of it aged badly. Change my mind, genuinely — I have no stake in being right about this. The dead space question sent me down a rabbit hole for a week. It is a fraction of a unit and it is the same every draw. Spent 13 weeks confused about this until somebody…
Adding more water does not change how much peptide is in the vial. It changes the concentration, which changes the volume you draw for the same amount. That is the entire relationship.
Reminder: this board does maths, not dosing. Nobody here tells another member what amount to take.
Pushback on the syringe advice: a U-100 barrel reads units of volume. Calling them "doses" is how the confusion starts.
Are you accounting for the powder volume, or is that where the confusion is?
Yes. Writing 20mg/mL on the vial takes four seconds and removes the entire class of error this board exists to fix.
What concentration did you actually reconstitute at, rather than what did you intend to?
Correction: that gives 10 units, not what you have written. 30mg into 3mL is 10mg/mL and the division follows from there.
That only works if the fill weight is exactly the label weight, and it usually is not exactly anything.
the powder cake sits at the bottom, the volume you add is the volume that counts
Did the maths give you a whole number of units, or a fraction?
How many mg in the vial and how many mL are you adding?