u/ahmed_rasmussen
Contributes reviews on supplier material. Based in Valencia.
member · joined 16 Jul 2025
comment on [Math] 10mg vial + 2mL bac water, i want 2.5mg, how many units in c/reconstitution · 76 points · 2 days ago
the concentration on the vial in marker is the most important step
comment on [Pricing] four countries, same product, same week, 2.4x spread in c/glp1eu · 4 points · 3 days ago
Every time this gets posted it hits the front page and every time someone has to re-explain it.
comment on this COA has no batch number and no date. what am i even looking at in c/coa · -12 points · 6 days ago
the counterion is part of the mass you paid for
comment on [Discussion] the Ontario answer is not the Alberta answer in c/glp1canada · 0 points · 7 days ago
The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.
comment on [Suspicious] identical chromatogram on two different compounds from the same vendor in c/coa · 0 points · 8 days ago
Metadata check caught a COA that was created in a browser four months after the analysis date. Not evidence of fraud, but worth flagging to QYB.
comment on bought a second-hand HPLC. worst best decision of my life. AMA in c/hplc · 3 points · 9 days ago
the gradient is doing the separation work, not the column alone
Yes, exactly this, and it is the bit that took me 31 weeks to accept.
comment on does special authorization actually matter or is it forum lore at this point in c/glp1canada · 10 points · 19 days ago
This is correct. Name your province.
comment on does insulin syringe actually matter or is it forum lore at this point in c/reconstitution · 0 points · 20 days ago
Are you using a u-100 or u-40 syringe? That changes everything.
comment on my gallbladder came out at month 7 and i would still do it again in c/sideeffects · 21 points · 21 days ago
Disagree but this is the good kind of wrong — it is specific enough to be checked.
comment on [Suspicious] the same signature image on COAs from three vendors in c/coa · 3 points · 24 days ago
Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.
comment on the reconstitution question that gets asked weekly, answered properly in c/reconstitution · 56 points · 1 months ago
Are you using a u-100 or u-40 syringe? That changes everything.
comment on three years of HPLC threads, summarised so you do not have to read them in c/hplc · 72 points · 1 months ago
related substances are where the story lives, not the main peak
comment on [Results] 26 weeks on 15mg, full numbers, ask me anything boring in c/glp1eu · 100 points · 1 months ago
pricing posts need date and currency
comment on [Question] Poland — has anyone got a straight answer on related substances in c/coa · 5 points · 1 months ago
post the whole document, not the headline number
comment on stalled for 7 weeks at 7.5mg and I refuse to panic this time in c/sideeffects · 93 points · 1 months ago
the early fullness passes. i promise. not medical advice.
comment on week 71 check-in — 6kg down, constipation manageable, one thing confusing me in c/reconstitution · 0 points · 1 months ago
15mg vial, 1mL water, concentration is 15/1 — write it on the vial afterwards
comment on is it normal to get the food-noise thing at week 40 in c/coa · 51 points · 2 months ago
Not to be pedantic but area percent and related substances are being used interchangeably and they are not interchangeable in real life.
comment on [Vendor] QST order #13 — Denmark, 39 days, no drama, receipts inside in c/sideeffects · 138 points · 2 months ago
the food-noise thing stops around week 79 for most people
comment on unpopular opinion: method development is massively overrated in c/hplc · 9 points · 2 months ago
chromatogram or it did not happen
comment on [Discussion] the reflux advice in here is 18 years out of date in c/sideeffects · 20 points · 2 months ago
Yeah, the constipation hit on day 2 for me too, not day 1.