the bacteriostatic water question that gets asked weekly, answered properly
Posting this because I searched for it and got nothing useful.
Setup: 0.25mg, week 32, sulphur burps present but not ruining anything. I changed exactly one variable — concentration — and tracked it for 9 weeks.
Result: a difference, but a small one, and well inside what I would call noise if someone else posted it. So I am putting it here rather than presenting it as a finding. If two or three other people have done the same thing we might actually learn something.
Not medical advice, obviously. This is one person with a spreadsheet.
best — the order this archive was captured in
Water content matters more than people think. If a vial is carrying residual moisture, your "10mg" is not 10mg of peptide.
swirl, do not shake, or you are courting oxidation
I am going to push back on this slightly.
never post a calculation as advice without stating the concentration
Flair changed to match the content. Read the sidebar before posting next time and we are square.
Slight fix: the number was 98.7, not 97.6. Decimal point, but a fairly consequential one.
Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.
dosing errors come from people reconstituting two vials differently and forgetting which is which
Disagree. What you are describing is consistent with reconstitution, not with what you concluded.
Slight fix: the number was 97.6, not 97.2. Decimal point, but a fairly consequential one.
Did you write the concentration on the vial?
The single most useful thing I did was write the concentration on the vial. Stopped all the confusion after that.
Slight fix: the number was 98.1, not 98.0. Decimal point, but a fairly consequential one.
Spent 14 weeks confused about concentration math until someone showed me the table. 20mg, 3mL, concentration is 20/3.
Spent 14 weeks confused about concentration math until someone showed me the table.
Disagree on that part. 99.3% and 93.7% on the same vial is normal.
stopper coring on the 22th draw because you keep using the same entry point. rotate.
never post a calculation as advice without stating the concentration
Did you write the concentration on the vial?
Did you write the concentration on the vial?
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
bacteriostatic and sterile water are not interchangeable, do not use them that way
This is correct. 2mL versus 10mL is the common mistake.
dead space is real and the syringe matters
dead space is real and the syringe matters
This is correct. 2mL versus 13mL is the common mistake.
Yeah, showing the arithmetic is the fastest way for someone to spot the error.
Not to be pedantic but mg/mL and bacteriostatic water are being used interchangeably and they are not interchangeable in real life.
Are you using a u-100 or u-40 syringe? That changes everything.
- 1Dead space in the needle hub holds a small but non-trivial volume. On…8 comments in this branch · started by u/swirl_dont_shake
- 2never post a calculation as advice without stating the concentration6 comments in this branch · started by u/yusuf_nakamura