u/niels_lindqvist
Contributes reviews on supplier material. Based in Córdoba.
member · joined 16 Jul 2025
comment on [Explainer] the crypto discount is real and so is losing chargeback rights in c/cryptopay · 31 points · 7 days ago
Did you send a test amount first?
comment on bought a second-hand HPLC. worst best decision of my life. AMA in c/hplc · 0 points · 8 days ago
Resolution between two peaks depends on retention, selectivity and efficiency.
Agreed. And the corollary is that the method line on a certificate is not decoration, it is the number’s provenance.
comment on why does everyone say week 4 is the wall in c/semaglutide · 8 points · 11 days ago
This is the part I would underline for anyone skimming.
Disagree with this specific line. A pause at 0.25mg is not evidence that 0.25mg has stopped working.
comment on [Regret] i ignored the abdominal pain for four days in c/darkspot · 0 points · 14 days 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.
comment on [Question] what is a reasonable system suitability RSD for this work in c/hplc · 4 points · 16 days ago
reproducibility beats resolution if you only get one of them
Adding one practical thing — run the blank. It answers this before anyone has to argue about it.
comment on the dose escalation question that gets asked weekly, answered properly in c/retatrutide · 32 points · 17 days 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.
comment on [Titration] stayed at 0.5 for eleven weeks and it was the right call in c/semaglutide · 5 points · 18 days ago
Does early fullness track the day after the shot, or is it there all week?
comment on [Lab] split one vial across Janoshik and Medutest — 99.2% and 98.9% in c/retatrutide · 65 points · 20 days ago
a lot of the confident posting here is extrapolation
comment on [Discussion] we talk about dose like it is a score and it is not in c/semaglutide · 6 points · 25 days ago
Research-use-only material is not approved for human use, so anything in this thread about how a compounded or research vial "should" behave is a chemistry discussion, not a dosing one.
comment on [Vendor] HJ order #7 — Denmark, 4 days, no drama, receipts inside in c/cryptopay · 20 points · 26 days ago
gas is not the supplier’s fee
teodor_jansen is right about confirmations. "Sent" is not a status.
comment on method development — 14 things I got wrong before I got it right in c/hplc · -28 points · 29 days 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.
comment on [Failure] two years in, stopped for financial reasons, regained most of it in c/darkspot · 6 points · 1 months ago
accusing the wrong party and correcting it publicly is the best kind of post here
comment on genuine question about purity that I am slightly embarrassed to ask in c/hplc · 3 points · 1 months ago
Sent the same vial to PeptideMeter and VendorInvestigate. 99.3% against a claimed 98.5%. The difference was the gradient, not the material.
comment on small win: dose escalation stopped being a problem at week 55 in c/retatrutide · 74 points · 1 months ago
How fast was the escalation? That is usually the variable that explains the reports.
comment on unpopular opinion: most of what gets said here about triple agonist is guesswork in c/retatrutide · 40 points · 1 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.
comment on [PSA] HPLC is not what most of this community thinks it is in c/hplc · 4 points · 1 months ago
UV response is not uniform across species. At 214nm you are looking at the peptide bond, which is why it is the working wavelength for this class; at 280nm you only see tryptophan, tyrosine and phenylalanine.
comment on the method development thing finally clicked for me and I want to write it down in c/hplc · 139 points · 1 months ago
Area percent is the integrated area of your peak over the total integrated area at one wavelength on one gradient. Change any of those and the number changes without the sample changing.
comment on unpopular opinion: most of what gets said here about HPLC is guesswork in c/hplc · 19 points · 2 months ago
Correction: that is a tailing factor, not a plate count. Different diagnostics for different problems.
comment on help me understand chargeback, I have read the wiki twice in c/cryptopay · 10 points · 2 months ago
screenshot the transaction hash, not the wallet balance
comment on is it normal to get injection-site soreness at week 72 in c/retatrutide · 19 points · 2 months ago
How fast was the escalation?
Adding the standing caveat: none of this is approved anywhere and research material is not for human use.
comment on how much of what we believe about plateau actually comes from Wegovy threads in c/semaglutide · 48 points · 2 months ago
Correct, and worth adding: the trial average is an average. Half the people in it did worse than 15% and were still on the drug.
comment on [Vendor] CPC vs MKM on the same compound, same month — both cleared 97.5% in c/semaglutide · 19 points · 2 months ago
Yes. Week 45 is when almost everybody writes the "is it still working" post, and almost everybody is fine.
comment on does HPLC actually matter or is it forum lore at this point in c/hplc · 94 points · 3 months ago
Do you have the mass, or only the UV trace?
comment on reading lost money threads from 2024 and half of it aged badly in c/darkspot · 11 points · 3 months ago
That was a hold rather than a loss, and it resolved. Updating rather than deleting.
comment on [Vendor] KP order #4 — Ireland, 13 days, no drama, receipts inside in c/cryptopay · 23 points · 3 months ago
Confirmation took forty minutes on a busy evening and I had already written half an angry message. Deleted it.
comment on [Discussion] we are measuring confirmations at the wrong time and calling it noise in c/cryptopay · 1 points · 4 months ago
Confirmations are the count of blocks built on top of the one containing your transaction.
Disagreeing here: that is a network fee at a busy hour and it is not the supplier’s doing.
comment on genuine question about retatrutide that I am slightly embarrassed to ask in c/retatrutide · 297 points · 4 months 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.
comment on plateau — 21 things I got wrong before I got it right in c/semaglutide · 1 points · 4 months ago
stalling at 2.4mg is information, not a verdict
comment on help me understand retatrutide, I have read the wiki twice in c/retatrutide · 1 points · 4 months 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.
comment on does stopped actually matter or is it forum lore at this point in c/darkspot · 7 points · 4 months ago
This. Correcting a wrong accusation in public is the hardest and most valuable post anybody makes here.
comment on reading HPLC threads from 2024 and half of it aged badly in c/hplc · 62 points · 4 months ago
Agreed.
Adding one practical thing — run the blank. It answers this before anyone has to argue about it.
comment on why does nobody talk about lost money in c/darkspot · 12 points · 5 months ago
the fridge failure story happens every summer
comment on 5 months in and failure is still the thing I get wrong in c/darkspot · 14 points · 6 months ago
A public correction of a wrong accusation is worth more to the record than the original report, because it is the thing that keeps the rest of the archive trustworthy.
comment on genuine question about glucagon that I am slightly embarrassed to ask in c/retatrutide · 29 points · 6 months ago
Sent a vial to Medutest out of curiosity. Result was 98.2% against a claimed 97.5%, which is the first independent number I had seen for this compound anywhere.
comment on the chargeback question that gets asked weekly, answered properly in c/cryptopay · 156 points · 7 months ago
Nearly sent on the wrong network.
Adding the cheap insurance — test amount first on anything large.
comment on Ozempic: the version I wish someone had shown me in week 1 in c/semaglutide · 4 points · 7 months ago
if 2.4mg is working there is no prize for going up
comment on reading retatrutide threads from 2024 and half of it aged badly in c/retatrutide · 10 points · 8 months ago
not approved anywhere, which is the single most important fact in this board
comment on the confirmations question that gets asked weekly, answered properly in c/cryptopay · 176 points · 8 months ago
Confirmations are the count of blocks built on top of the one containing your transaction. Until there are some, the transaction is not settled in any meaningful sense.
comment on small win: weekly dosing stopped being a problem at week 23 in c/semaglutide · 147 points · 8 months ago
That reads like a titration plan and this board cannot give you one. Somebody who actually knows your history has to.
comment on nobody warned me about injection-site soreness and I would have liked the warning in c/semaglutide · 13 points · 8 months ago
Does injection-site soreness track the day after the shot, or is it there all week?