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EW

u/ewan_marchand

Contributes reviews on supplier material. Based in Kaunas.

member · joined 14 May 2025

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Overview — page 3 of 3

comment on moderation — 21 things I got wrong before I got it right in c/meta · 15 points · 1 year ago

Same view — strict evidence rules make this board slower and make the archive worth reading in three years.

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comment on someone explain HPLC to me like I have not read a paper in years in c/hplc · 288 points · 1 year ago

Yes. Retention time is a hypothesis about identity. Mass is the answer.

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comment on [Results] 63 weeks on 5mg, full numbers, ask me anything boring in c/tirzepatide · 30 points · 1 year ago

pens and vials are the same molecule, the price is the difference

Not sure about this bit. The GIP arm being real does not tell you that it is what caused your particular week.

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comment on help me understand goal weight, I have read the wiki twice in c/maintenancephase · -31 points · 1 year ago

stretching the interval is not the same as reducing the dose

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comment on genuine question about customs that I am slightly embarrassed to ask in c/customs · 1 points · 1 year ago

if it matters, ask somebody qualified in your own jurisdiction

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comment on [Question] how do you actually verify test results in c/labresults · 117 points · 1 year ago

That service reports area percent by default. Worth stating, since the thread has been comparing it to a mass figure.

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comment on triple agonist: the version I wish someone had shown me in week 1 in c/retatrutide · 183 points · 1 year ago

the TRIUMPH programme is still running, so anything definitive is premature

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comment on [Question] is 93.7% actually fine or am I being sold a rounding error in c/tirzepatide · 5 points · 1 year ago

Careful with "everyone tolerates it better". The people it did not suit stop posting, which makes this board look calmer than the drug is.

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comment on meta — 21 things I got wrong before I got it right in c/meta · 1 points · 1 year ago

removals get explained publicly where the rule allows it

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comment on [Question] is 98.1% actually fine or am I being sold a rounding error in c/hplc · 0 points · 1 year ago

How old is the column and roughly how many injections has it seen?

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comment on [Discussion] chromatogram is doing more work than we give it credit for in c/hplc · 32 points · 1 year ago

System suitability — repeat injections, tailing factor, plate count, RSD on area — is what tells you the instrument was fit for the measurement that day. Without it, the purity figure is unanchored.

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comment on [Discussion] below spec is doing more work than we give it credit for in c/labresults · 16 points · 1 year ago

That reading assumes area percent and net peptide content are the same number. They are not, and the report says which it is.

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comment on [PSA] GIP is not what most of this community thinks it is in c/tirzepatide · 206 points · 1 year ago

Held 7.5 for five months. Everyone kept asking when I was going to 10. The answer was never, because 7.5 was working.

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comment on import is the most under-discussed thing on this board in c/customs · 1 points · 1 year 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.

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comment on the maintenance thing finally clicked for me and I want to write it down in c/maintenancephase · 72 points · 1 year ago

do not chase the last two kilos with a dose increase

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comment on the maintenance thing finally clicked for me and I want to write it down in c/maintenancephase · 3 points · 1 year ago

Yes — interval stretching and dose reduction are different levers and people use the words interchangeably.

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comment on [Question] chromatogram — what am I missing here in c/hplc · 22 points · 1 year 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.

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comment on test results — 20 things I got wrong before I got it right in c/labresults · 0 points · 1 year ago

Agreed — and two services on one batch is the strongest thing any of us can produce individually.

stubborn_batchlist_only is right that the band matters more than the peak. Consistency across lots is the finding.

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comment on [Question] how do you actually verify goal weight in c/maintenancephase · 0 points · 1 year ago

Left up.

Disagreeing with this bit: a two-kilo range is not drift and treating it as a problem creates one.

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comment on [Question] how do you actually verify goal weight in c/maintenancephase · 555 points · 1 year 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.

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comment on personal import — 17 things I got wrong before I got it right in c/customs · 20 points · 1 year ago

Clearance took four days and the carrier took eleven. I had been blaming entirely the wrong stage for a year.

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comment on unpopular opinion: most of what gets said here about integration is guesswork in c/hplc · 9 points · 1 year ago

reproducibility beats resolution if you only get one of them

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comment on [Meta] the chromatogram rule is doing its job and people should stop complaining in c/hplc · 6 points · 1 year ago

What did system suitability look like on that sequence?

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comment on [Results] 45 weeks on 0.25mg, full numbers, ask me anything boring in c/retatrutide · 531 points · 1 year ago

It is a triple agonist at the GLP-1, GIP and glucagon receptors. The glucagon arm is the genuinely novel component and it is the one with the least human outcome data behind it.

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comment on [Lab] MKM cagri — Medutest came back 97.2% against a claimed 97.0% in c/hplc · 52 points · 1 year ago

Sent the same vial to Medutest and Janoshik.

Agreed. And the corollary is that the method line on a certificate is not decoration, it is the number’s provenance.

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comment on someone explain LC-MS to me like I have not read a paper in years in c/hplc · 15 points · 1 year ago

System suitability — repeat injections, tailing factor, plate count, RSD on area — is what tells you the instrument was fit for the measurement that day. Without it, the purity figure is unanchored.

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comment on [Meta] the retatrutide rule is doing its job and people should stop complaining in c/retatrutide · 51 points · 1 year ago

The phase 2 readout ran to 48 weeks in a few hundred participants with a slow escalation. Both the size and the duration matter when people quote the headline number.

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comment on do test results actually matter or is it forum lore at this point in c/labresults · 73 points · 1 year 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.

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comment on do test results actually matter or is it forum lore at this point in c/labresults · 422 points · 1 year ago

Small fix — same supplier, different lot. The two rows in the log are not the same batch.

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comment on [Results] 57 weeks, 25kg, and glucagon was the hard part in c/retatrutide · 181 points · 1 year ago

Correction: TRIUMPH is the phase 3 programme.

This is the sentence the rest of the board should read first. Phase 2 is not a label.

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comment on glucagon: what the trials say vs what this community says in c/retatrutide · 15 points · 1 year ago

heart rate is the thing people report watching

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comment on glucagon: what the trials say vs what this community says in c/retatrutide · 90 points · 1 year ago

Increases in heart rate have been reported across this receptor class. The magnitude and clinical significance are exactly what phase 3 is powered to establish.

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comment on [Lab] split one vial across Janoshik and Medutest — 95.1% and 99.3% in c/retatrutide · 1.5k points · 2 years ago

Left up.

Adding the standing caveat: none of this is approved anywhere and research material is not for human use.

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comment on [Lab] 22th independent test on WXT — 99.2% on a claimed 98.5%, and the trend is the interesting part in c/tirzepatide · 1 points · 2 years ago

a lot of people plateau nicely at 10mg and never need 15

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comment on stalled for 7 weeks at 10mg and I refuse to panic this time in c/retatrutide · 8 points · 2 years ago

nothing here is available as a prescription product, so read every thread with that in mind

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comment on someone explain phase 2 to me like I have not read a paper in years in c/retatrutide · 4 points · 2 years ago

a lot of the confident posting here is extrapolation

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comment on [Lab] 16th independent test on ERP — 97.4% on a claimed 97.0%, and the trend is the interesting part in c/hplc · 75 points · 2 years ago

Is that baseline drawn by the software or by hand?

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comment on lowest effective dose — 2 things I got wrong before I got it right in c/maintenancephase · 27 points · 2 years ago

Stretching the interval, reducing the dose, or both?

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comment on what would you tell week-1 you about dose escalation in c/retatrutide · 51 points · 2 years ago

research-use-only material is not approved for human use, full stop

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comment on help me understand below spec, I have read the wiki twice in c/labresults · 11 points · 2 years ago

Yes — date of analysis, because a result from two years ago describes a different manufacturing month.

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Several 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.