u/ewan_marchand
Contributes reviews on supplier material. Based in Kaunas.
member · joined 14 May 2025
comment on [Seizure] letter arrived, no prosecution, here is exactly what it said in c/customs · 1 points · 1 days ago
What documentation accompanied the shipment?
comment on [Rules] proposal: auto-flair any vendor post with no batch number in c/meta · 23 points · 1 days ago
Proposed a rule change here with actual wording and it was adopted.
Adding the practical note — the formula is published and you can reproduce the ordering yourself.
comment on [Lab] two reta batches, two services, 98.4% and 97.9% in c/retatrutide · 40 points · 2 days ago
the phase 2 numbers were striking and they were also 48 weeks in a small population
comment on [Lab] two reta batches, two services, 98.4% and 97.9% in c/retatrutide · 31 points · 3 days ago
Not convinced. You are attributing a week of sulphur burps to the glucagon arm when the escalation rate alone would explain it.
comment on [Explainer] integration decisions change your number more than the sample does in c/hplc · 18 points · 7 days ago
Ran a blank after a high-concentration injection and found the carryover I had been calling an impurity.
comment on GIP agonism explained like i am five, please in c/tirzepatide · 7 points · 10 days ago
2.5 is the starter dose and it is not meant to be the dose that works
comment on [Question] why is reta purity testing so much more variable between labs in c/retatrutide · 1 points · 10 days ago
Yes — the glucagon arm is what makes it a different proposition rather than a stronger version of the others.
comment on the nausea profile at 7.5 was worse than 10 for me and i cannot explain it in c/tirzepatide · 46 points · 11 days ago
switching from sema is not a dose conversion, there is no clean equivalence
comment on [PeptideMeter] QSC tirz — 97.1%, second sample from the same batch in c/labresults · 3 points · 14 days ago
First result I ever posted here got asked for the batch number and the claim. Fair, and my posts have been better ever since.
comment on [Results] two years, weight stable within 3kg, dose at a quarter of peak in c/maintenancephase · 19 points · 22 days ago
Maintenance is the phase with the least published guidance and the most individual variation, which is precisely why board consensus here is worth less than usual.
comment on does integration actually matter or is it forum lore at this point in c/hplc · 82 points · 23 days ago
Right.
This is the whole methodological point of the board in one line.
comment on does integration actually matter or is it forum lore at this point in c/hplc · 45 points · 23 days ago
two labs, two gradients, two honest answers
comment on does integration actually matter or is it forum lore at this point in c/hplc · 48 points · 23 days ago
Gave the same trace to two people I trust and got two integrations about a point apart. That was the most educational afternoon I have had here.
comment on [Appeal] the modmail-first policy and why it exists in c/meta · 15 points · 24 days ago
Proposed a rule change here with actual wording and it was adopted. That is the process working and it is not fast.
comment on [Question] does the vial concentration change how much dead space costs me in c/tirzepatide · 28 points · 27 days ago
This matches mine. Milder muscle cramps than I expected, and what there was settled inside a fortnight of each step.
comment on [Long Term] what my labs look like three years in in c/maintenancephase · 53 points · 28 days ago
Dose reduction and interval extension are different interventions. Halving the dose keeps the rhythm and lowers the level; stretching keeps the level and lowers the frequency, with a lower trough.
comment on [Medutest] SWB sema — 98.2%, cold chain intact, 9 days transit in c/labresults · -21 points · 1 months ago
results without method are gossip with decimals
comment on [Results] 65 weeks on 15mg, full numbers, ask me anything boring in c/tirzepatide · 8 points · 1 months ago
the trials titrated on a calendar, real people titrate on symptoms
comment on dual agonist — my 18-week log, condensed into one table in c/tirzepatide · 8 points · 1 months ago
The 21% figure is a 72-week mean on the highest arm. Quoting it as what someone should expect by week 27 is not a fair reading.
comment on [Discussion] can we stop arguing about import until somebody posts a number in c/customs · 3 points · 1 months ago
Disagree — that is the position in one country and this thread is about another. They are genuinely different.
comment on dual agonist — my 18-week log, condensed into one table in c/tirzepatide · 14 points · 1 months ago
The distribution matters more than the mean.
Saving this one. It is the clearest statement of the stall problem I have read here.
comment on [Discussion] we are measuring tirzepatide at the wrong time and calling it noise in c/tirzepatide · 21 points · 1 months ago
the reflux profile is genuinely gentler than people expect coming from sema
comment on genuine question about purity that I am slightly embarrassed to ask in c/hplc · 3 points · 1 months ago
Resolution between two peaks depends on retention, selectivity and efficiency. A shallower gradient buys retention and usually resolution, at the cost of peak width and run time.
comment on am I the only one who found Mounjaro harder than the injections in c/tirzepatide · 0 points · 1 months ago
Came off sema and onto tirz with a two-week gap.
Saving this one. It is the clearest statement of the stall problem I have read here.
comment on [Below Spec] 94.1% with a 1.8% single impurity. is that the des-amido in c/labresults · 20 points · 1 months ago
Fourth lot from the same supplier in the log now and the band has been tight the whole way. That consistency is the actual finding.
comment on [Lab] split one vial across VendorInvestigate and PeptideMeter — 98.6% and 98.4% in c/hplc · 121 points · 1 months ago
That is area percent, not mass percent. The trace cannot give you the second one.
comment on anyone else notice tirzepatide kicking in around week 13 in c/tirzepatide · 33 points · 1 months ago
The thing nobody warned me about was how much of this is logistics — storing it, remembering it, the same day every week.
Saving this one. It is the clearest statement of the stall problem I have read here.
comment on regain: what the trials say vs what this community says in c/maintenancephase · 25 points · 1 months ago
What does your weigh-in frequency look like at this point?
comment on unpopular opinion: most of what gets said here about lowest effective dose is guesswork in c/maintenancephase · 7 points · 2 months ago
the trials that looked at withdrawal are unambiguous about what follows
comment on [PSA] phase 2 is not what most of this community thinks it is in c/retatrutide · 148 points · 2 months ago
wait for phase 3 before you argue about rankings
comment on [Question] how do you actually verify LC-MS in c/hplc · 2 points · 2 months ago
a blank injection between samples costs four minutes and settles most arguments
comment on help me understand declared value, I have read the wiki twice in c/customs · 25 points · 3 months ago
Nothing on this board is legal advice. Where a notice carries a deadline or a consequence, that is a matter for somebody qualified in your own jurisdiction.
comment on moderation is the most under-discussed thing on this board in c/meta · 1 points · 3 months ago
evidence rules are strict here on purpose
comment on [Meta] proposal — a flair for Medutest posts in c/labresults · 92 points · 3 months ago
A series across separate lots estimates a process. Repeat tests on one lot estimate the measurement. Both are useful and they answer different questions.
comment on how much of what we believe about dose escalation actually comes from glucagon threads in c/retatrutide · 94 points · 3 months ago
triple agonist — GLP-1, GIP and glucagon, and the glucagon arm is the new part
comment on [Meta] the LC-MS rule is doing its job and people should stop complaining in c/hplc · 2 points · 3 months ago
Is that baseline drawn by the software or by hand?
comment on [Meta] the LC-MS rule is doing its job and people should stop complaining in c/hplc · 475 points · 3 months ago
Correction: that is a tailing factor, not a plate count. Different diagnostics for different problems.
comment on [Meta] the customs rule is doing its job and people should stop complaining in c/customs · 16 points · 3 months ago
ask the supplier what documentation accompanies the shipment
comment on [Meta] proposal — a flair for integration posts in c/hplc · 38 points · 4 months ago
Carryover from a previous high-concentration injection looks exactly like a small impurity. The blank injection is four minutes and it removes the ambiguity entirely.
comment on unpopular opinion: most of what gets said here about import is guesswork in c/customs · 10 points · 4 months ago
A hold, a request for information and a seizure are distinct administrative events. Each has its own process and deadlines, and the notice itself states which one you have.