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EW

u/ewan_zielinski

Contributes reviews on supplier material. Based in Tilburg.

member · joined 15 Jun 2025

6,867post karma
4,723comment karma
4submissions
77comments

comment on [PCOS] my androgens moved before my weight did in c/glp1women · 0 points · 14 days ago

Anything involving pregnancy, contraception efficacy or fertility planning belongs with a clinician. That is not a disclaimer, it is where the answers actually are.

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comment on is it normal to get muscle cramps at week 85 in c/retatrutide · 29 points · 21 days ago

Careful with the rankings. A phase 2 result and a phase 3 result are not on the same evidential footing and cannot be listed in one table.

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comment on [Pattern] the fake-testing-service scam is getting better and that worries me in c/scamalerts · -14 points · 22 days ago

Not convinced. A payment window that closed is a payment window, not evidence of intent.

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comment on [Failure] fridge died in a heatwave and i lost three months of material in c/darkspot · 34 points · 25 days ago

Where a supplier has no independent testing on file, that is a statement about the evidence and not about their conduct. Saying it the second way is how this board would stop being useful.

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comment on [Unverified] anyone else get a DM offering "wholesale pricing" in c/scamalerts · 6 points · 26 days ago

Correction: that domain is one character different from the one you posted, which is rather the point of this thread.

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comment on method development — 14 things I got wrong before I got it right in c/hplc · 1 points · 1 months ago

Bought a second-hand instrument and learned more in six months of fixing it than in three years of reading traces.

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comment on stalled for 2 weeks at 12.5mg and I refuse to panic this time in c/glp1women · 0 points · 1 months ago

Hormonal variation across the cycle affects appetite, fluid retention and subjective symptom intensity independently of anything else, which is why an unannotated log can look mysterious.

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comment on [Meta] proposal — a flair for glucagon posts in c/retatrutide · 3 points · 1 months ago

The food noise profile felt different rather than worse. Hard to describe and impossible to quantify, so take it as an impression.

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comment on retatrutide is the most under-discussed thing on this board in c/retatrutide · 19 points · 1 months ago

Are you comparing against phase 3 numbers for something else? They are not comparable.

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comment on genuine question about method development that I am slightly embarrassed to ask in c/hplc · 29 points · 1 months ago

Same view — reporting the gradient is what makes a result checkable rather than merely stated.

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comment on the fertility question that gets asked weekly, answered properly in c/glp1women · 1 points · 1 months ago

Disagree — that is a general claim about absorption and the specific question needs a pharmacist rather than a board.

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comment on TRIUMPH is the most under-discussed thing on this board in c/retatrutide · 31 points · 2 months ago

Are you comparing against phase 3 numbers for something else? They are not comparable.

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comment on TRIUMPH is the most under-discussed thing on this board in c/retatrutide · 0 points · 2 months ago

Small fix — three receptors, not two. GLP-1, GIP and glucagon, and the third one is the reason this compound gets its own board.

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comment on someone explain insulin resistance to me like I have not read a paper in years in c/glp1women · 49 points · 2 months ago

The same dose genuinely feels different at different points in the month for me. Took a year to notice and it was in the log the whole time.

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comment on does phase 2 actually matter or is it forum lore at this point in c/retatrutide · 85 points · 2 months ago

the escalation is where most of the reported trouble sits

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comment on does phase 2 actually matter or is it forum lore at this point in c/retatrutide · 107 points · 2 months ago

How fast was the escalation? That is usually the variable that explains the reports.

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comment on does HPLC actually matter or is it forum lore at this point in c/hplc · -23 points · 3 months ago

area percent is relative to what the detector saw and nothing else

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comment on triple agonist: what the trials say vs what this community says in c/retatrutide · 107 points · 3 months ago

not approved anywhere, which is the single most important fact in this board

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comment on [PSA] exit scam is not what most of this community thinks it is in c/scamalerts · 1 points · 3 months ago

Never name an individual. The sidebar rule exists because the cost of being wrong falls on a person and the benefit of being right falls on nobody in particular.

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comment on [Lab] QST tirz — Janoshik came back 99.5% against a claimed 99.0% in c/scamalerts · 7 points · 3 months ago

the review page nobody can find on any other site is a warning

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comment on anyone else notice failure kicking in around week 21 in c/darkspot · 14 points · 3 months ago

What would have caught it earliest?

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comment on [Discussion] we are measuring PCOS at the wrong time and calling it noise in c/glp1women · 0 points · 4 months ago

cycle timing changes how the same week feels

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comment on why does nobody talk about HPLC in c/hplc · 16 points · 4 months ago

That is area percent, not mass percent. The trace cannot give you the second one.

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comment on someone explain gradient to me like I have not read a paper in years in c/hplc · 12 points · 4 months ago

Not convinced by that integration. Dropping the baseline there absorbs part of the shoulder into the main peak.

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comment on reading HPLC threads from 2024 and half of it aged badly in c/hplc · 1 points · 4 months ago

Small fix — 214nm, not 210. It matters for the comparison you are making with the other run.

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comment on [Question] is 97.9% actually fine or am I being sold a rounding error in c/retatrutide · 302 points · 4 months ago

Nothing containing this compound is approved anywhere. Research-use-only material is not approved for human use, and that is a statement of fact rather than a disclaimer.

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comment on reading HPLC threads from 2024 and half of it aged badly in c/hplc · 12 points · 5 months ago

retention time alone is not identity

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comment on [Discussion] we are measuring cloned site at the wrong time and calling it noise in c/scamalerts · 97 points · 5 months ago

a cloned storefront copies the design, never the documentation

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comment on [Results] 35 weeks on 2.4mg, full numbers, ask me anything boring in c/glp1women · 2 points · 5 months ago

ask a clinician about anything involving pregnancy, without exception

Disagreeing with this line: the absorption question has a product-specific answer and a pharmacist has it.

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comment on [Question] how do you actually verify purity in c/hplc · 1 points · 5 months ago

214nm sees the peptide bond, 280nm sees the aromatics

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comment on [Lab] WXT reta — PeptideMeter came back 97.1% against a claimed 97.0% in c/retatrutide · 1 points · 5 months ago

Phase 2 estimates effect and finds a dose range.

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

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comment on [Meta] proposal — a flair for HPLC posts in c/hplc · 1 points · 6 months ago

Right. And a blank between injections settles the carryover argument before it starts.

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comment on small win: PCOS stopped being a problem at week 61 in c/glp1women · 10 points · 6 months ago

Have you asked a pharmacist about the absorption question specifically?

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comment on group buy — 11 things I got wrong before I got it right in c/scamalerts · 18 points · 7 months ago

That is a report count, not a test count, and it changes how thin the evidence base actually is.

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comment on [Discussion] can we stop arguing about stopped until somebody posts a number in c/darkspot · 6 points · 8 months ago

Went up too fast because the scale had stalled and I was impatient. Got fatigue I did not need and a data point I could not interpret.

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comment on [Discussion] can we stop arguing about stopped until somebody posts a number in c/darkspot · 15 points · 8 months ago

Right, and stopping for money reasons is not a failure of anything.

Agreed — and being harder on yourself than you would be on somebody else posting the same thing is the pattern here.

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comment on small win: fertility stopped being a problem at week 55 in c/glp1women · 36 points · 8 months ago

Trial populations for the major programmes were not designed around the questions this board asks most often, which is why the evidence base here is genuinely thinner rather than merely harder to find.

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comment on reading gradient threads from 2024 and half of it aged badly in c/hplc · 354 points · 8 months ago

integration decisions move the number more than the sample does

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comment on the fraud thing finally clicked for me and I want to write it down in c/scamalerts · 153 points · 8 months ago

if the price is impossible, the material is the thing being economised on

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Cake day 15 Jun 2025
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Janoshik Analytical

Independent HPLC and mass spec. The number you get is the number they found.

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GL Biochem (Shanghai)

Custom peptides and amino acids direct from the manufacturer since 1998. ISO 9001 / cGMP. Batch COA every order.

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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.