mg in vial ÷ mL added = mg/mL. Everything else is arithmetic you can check.
long-standing contributor · syringe math · joined 27 Feb 2024
Overview — page 2 of 3
comment on [Discussion] dead space is doing more work than we give it credit for in c/reconstitution · 63 points · 7 months ago
Working has to be shown on arithmetic posts. Added a note asking for it rather than removing this one.
comment on the dead space thing finally clicked for me and I want to write it down in c/reconstitution · 6 points · 7 months ago
aim the stream at the glass wall, not at the cake
comment on does non-scale victory actually matter or is it forum lore at this point in c/progresspics · 1 points · 7 months ago
30kg over 13 months and honestly the most useful marker was that stairs stopped being a decision.
comment on how much of what we believe about concentration actually comes from mg/mL threads in c/reconstitution · 151 points · 8 months ago
Left up and flaired Explainer — the numbers in this one check out.
comment on someone explain goal to me like I have not read a paper in years in c/progresspics · 142 points · 8 months ago
Stalled for 9 weeks and measured my waist out of stubbornness. It had moved. The scale had not.
comment on three years of tapering threads, summarised so you do not have to read them in c/tapering · 80 points · 9 months ago
Preparing to stop, as described by people here who have done it.
Write down where you are first: dose, date, weight, waist, and an honest note about how appetite feels. That page is what makes the following six months interpretable rather than a fog of impressions.
Decide in advance what you are watching for and over what period — appetite in the first month, weight over three, and a specific threshold at which you would want to revisit the decision. Have the conversation with a clinician before rather than after.
None of that is a schedule. It is a way of arriving at whatever happens next with information rather than with a vague sense of how it is going.
comment on [Meta] proposal — a flair for reconstitution posts in c/reconstitution · 6 points · 9 months ago
Reminder: this board does maths, not dosing. Nobody here tells another member what amount to take.
comment on why does nobody talk about interval stretching in c/tapering · 41 points · 9 months ago
a fortnight of nothing is not evidence that you are fine
comment on [Discussion] concentration is doing more work than we give it credit for in c/reconstitution · 323 points · 10 months ago
Left up and flaired Explainer — the numbers in this one check out.
comment on mg/mL is the most under-discussed thing on this board in c/reconstitution · 307 points · 10 months ago
Left up and flaired Explainer — the numbers in this one check out.
comment on [Meta] proposal — a flair for dead space posts in c/reconstitution · 1 points · 11 months ago
a U-100 syringe reads 100 units to the millilitre, every time
comment on [Discussion] the reconstitution advice in here is 3 years out of date in c/reconstitution · 37 points · 11 months ago
Left up and flaired Explainer — the numbers in this one check out.
comment on the insulin syringe thing finally clicked for me and I want to write it down in c/reconstitution · 9 points · 12 months ago
Shook the first vial because nobody told me not to. It was fine, but I have swirled every one since.
comment on genuine question about bacteriostatic water that I am slightly embarrassed to ask in c/reconstitution · 144 points · 1 year ago
The lyophilised cake displaces a small volume, so the true concentration is very slightly lower than the arithmetic suggests. It is a fraction of a percent and it is dwarfed by fill tolerance.
comment on the dead space question that gets asked weekly, answered properly in c/reconstitution · 2 points · 1 year ago
Reminder: this board does maths, not dosing. Nobody here tells another member what amount to take.
comment on [PSA] units are not what most of this community thinks it is in c/reconstitution · 15 points · 1 year ago
Working has to be shown on arithmetic posts. Added a note asking for it rather than removing this one.
comment on does reconstitution actually matter or is it forum lore at this point in c/reconstitution · 0 points · 1 year ago
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.
comment on does reconstitution actually matter or is it forum lore at this point in c/reconstitution · 1 points · 1 year ago
Small fix — a U-100 syringe is 100 units per mL.
Adding one thing — put the date on the label too. Concentration plus date and you can never mix two vials up.
comment on units — 21 things I got wrong before I got it right in c/reconstitution · 112 points · 1 year ago
Corrected the concentration in the title, which contradicted the body. Nothing else touched.
comment on the reconstitution thing finally clicked for me and I want to write it down in c/reconstitution · 233 points · 1 year ago
Working has to be shown on arithmetic posts. Added a note asking for it rather than removing this one.
comment on [Discussion] we are measuring units at the wrong time and calling it noise in c/reconstitution · 543 points · 1 year ago
Corrected the concentration in the title, which contradicted the body. Nothing else touched.
comment on how much of what we believe about bacteriostatic water actually comes from units threads in c/reconstitution · 4 points · 1 year ago
What is written on the vial right now?
Asking properly rather than in a comment on somebody else’s thread: how much of what we believe about bacteriostatic water actually comes from units threads. Shook the…
comment on [Question] reconstitution — what am I missing here in c/reconstitution · 43 points · 1 year ago
Left up and flaired Explainer — the numbers in this one check out.
comment on switched from 0.5mg to 1.0mg and early fullness got better, not worse in c/tapering · 34 points · 1 year ago
appetite comes back before the weight does
comment on do units actually matter or is it forum lore at this point in c/reconstitution · 376 points · 1 year ago
Left up and flaired Explainer — the numbers in this one check out.
comment on someone explain insulin syringe to me like I have not read a paper in years in c/reconstitution · 20 points · 1 year ago
Corrected the concentration in the title, which contradicted the body. Nothing else touched.
comment on does concentration actually matter or is it forum lore at this point in c/reconstitution · 115 points · 1 year ago
Agreed — units are volume. Once that lands, the rest of the arithmetic is one division.
comment on does goal actually matter or is it forum lore at this point in c/progresspics · 38 points · 1 year ago
comparison is the thief of everything on a board like this
comment on [Discussion] we are measuring regain at the wrong time and calling it noise in c/tapering · 24 points · 1 year ago
Careful — interval stretching and dose reduction are different interventions and your post uses them interchangeably.
Agreed — and the exposure lag means the first fortnight tells you almost nothing.
comment on three years of appetite return threads, summarised so you do not have to read them in c/tapering · 0 points · 1 year ago
Withdrawal studies across this class consistently show substantial regain after discontinuation, with appetite typically returning before weight chang
Disagreeing with this bit: stretching and reducing are different things and the post treats them as one.
comment on milestone — 11 things I got wrong before I got it right in c/progresspics · 28 points · 2 years ago
What are you actually celebrating today? Genuine question.
comment on [Question] how do you actually verify mg/mL in c/reconstitution · 175 points · 2 years ago
Left up and flaired Explainer — the numbers in this one check out.
comment on three years of bacteriostatic water threads, summarised so you do not have to read them in c/reconstitution · 133 points · 2 years ago
Careful — that arithmetic is wrong. 20mg in 2mL is 10mg/mL, so 1mg draws to 10 units, not what you wrote.
comment on [Discussion] the mg/mL advice in here is 3 years out of date in c/reconstitution · 77 points · 2 years ago
If your calculation produces a fraction of a unit, the concentration is wrong for your dose. Change the water volume until the numbers land on whole units.
comment on unpopular opinion: most of what gets said here about reconstitution is guesswork in c/reconstitution · 159 points · 2 years ago
label the vial with the date as well as the concentration
comment on unpopular opinion: most of what gets said here about reconstitution is guesswork in c/reconstitution · 257 points · 2 years ago
Careful — that arithmetic is wrong. 10mg in 2mL is 5mg/mL, so 1.5mg draws to 30 units, not what you wrote.
unpopular opinion: most of what gets said here about reconstitution is guesswork — a position I have arrived at slowly and would like tested. Shook the first vial…
comment on [Discussion] we are measuring mg/mL at the wrong time and calling it noise in c/reconstitution · 57 points · 2 years ago
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.
comment on genuine question about reconstitution that I am slightly embarrassed to ask in c/reconstitution · 4 points · 2 years ago
Reminder: this board does maths, not dosing. Nobody here tells another member what amount to take.
Certified reference materials for peptide identity and purity work.
sigmaaldrich.comSeveral compounds discussed on GLP Research Hub are sold for research use only and are not approved for human use anywhere. Nothing here is medical advice and none of it is written by your clinician. If a post reads like an instruction, treat it as a description of what one stranger did.
Reference