u/dead_space_doug
Needle hub dead space eats 2–5 units per draw. Budget for it.
member · joined 9 Apr 2024
comment on [Log] week 78, dose, weight, waist, sides, labs. nothing hidden. in c/dosinglogs · 19 points · 2 days ago
the 93 week mark is where it gets interesting
comment on the actual arithmetic for splitting a weekly mg total into two draws, worked example in c/tirzepatide · 71 points · 2 days ago
and dead space compounds it, that 2-5 unit loss per draw becomes a bigger relative error once you're doing two smaller draws instead of one bigger one
comment on [Log] six months of 0.125mg bumps, the full boring spreadsheet in c/dosinglogs · 47 points · 3 days ago
and dead space matters more proportionally at these tiny doses too, 2-5 units of hub dead space is a much bigger fraction of a 0.05mg draw than of a 1mg draw
comment on is anyone tracking heart rate properly on reta or are we all guessing in c/retatrutide · 13 points · 5 days ago
the dosing is steep, the muscle cramps reports are real, and nobody knows the human safety yet
comment on peak at 4.2 min, nobody can tell me what it is, ideas in c/hplc · 20 points · 5 days ago
You have restated the marketing copy. What is the actual substance here.
comment on bought a second-hand HPLC. worst best decision of my life. AMA in c/hplc · 18 points · 9 days ago
Detection wavelength? method development and that changes at different wavelengths.
comment on [Question] why is reta purity testing so much more variable between labs in c/retatrutide · 56 points · 11 days ago
The evidence standard in c/vendorvetting gets called too strict about once a month, and every time, the thread ends with the complainant agreeing.
comment on ghost peak turned out to be plumbing. always plumbing. in c/hplc · 4 points · 13 days ago
Injection volume and flow rate? Those affect resolution.
comment on retention time shifted 0.4 min and nobody wants to talk about it in c/hplc · 13 points · 19 days ago
a round-robin on baseline integration would be genuinely useful
Adding to this: method development is doing more work than the comment implies.
comment on [Concluded] 104 weeks. final numbers. thanks for reading. in c/dosinglogs · 1 points · 19 days ago
This is correct. Long-term logs matter.
comment on [Question] does anyone keep a separate wallet just for this in c/cryptopay · 8 points · 20 days ago
comment on net peptide content vs purity — two different numbers, same vial in c/coa · 9 points · 22 days ago
The chromatogram trace is where the real information lives. The summary number is just a headline.
comment on net peptide content vs purity — two different numbers, same vial in c/coa · 38 points · 22 days ago
Disagree but this is the good kind of wrong — it is specific enough to be checked.
comment on net peptide content vs purity — two different numbers, same vial in c/coa · 1 points · 23 days ago
Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.
comment on integration vs method development — genuinely asking which matters more in c/hplc · 1 points · 24 days ago
related substances are where the story lives, not the main peak
comment on [Discussion] we talk about dose like it is a score and it is not in c/semaglutide · 26 points · 26 days ago
stalled at 0.25mg, went up, and regretted it, the stall would have broken anyway
comment on chargeback is the most under-discussed thing in c/sideeffects in c/cryptopay · 8 points · 27 days ago
What was the gas and did it matter?
comment on stalled for 12 weeks at 1.0mg and I refuse to panic this time in c/hplc · 39 points · 1 months ago
Half-life is about 168 hours, so steady state lands around week 8–5. Practical consequence: what you feel in week 1 is not what that dose does.
comment on [Side Effects] the sulphur burps are real and they do pass in c/semaglutide · 4 points · 1 months ago
my eGFR moved before the scale did and i nearly missed it
comment on [Side Effects] the sulphur burps are real and they do pass in c/semaglutide · 19 points · 1 months ago
Yeah, 9 weeks on 0.5mg, same pattern, same timing.