me.eriksen

TL2 · Faro

Contributes reviews on supplier material. Based in Faro.

Joined 15 April 2025 · last posted 1d

71 posts, newest first. Showing up to 150.

[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #128 · Sourcing › Independent verification · 27 Jul 2026 · 0 likes Combining a chromatographic result with a documentation review gives a more complete picture than two chromatographic results, because the failure modes are different.…
Follow-up: How compounding permissions changed when supply normalised Replied, post #68 · Sourcing › Regulatory · 25 Jul 2026 · 28 likes Where a claim about legality is made here, the useful follow-up is which instrument it rests on. Most such claims turn out to rest on a forum post. A qualification I…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #99 · Sourcing › Independent verification · 17 Jul 2026 · 0 likes Post #95 put the caveat in the right place and I want to underline it. Asking the supplier before publishing a discrepancy is the convention here. Most discrepancies…
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #41 · Evidence › Journal club · 9 Jul 2026 · 2 likes Agreed on SUSTAIN 6, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and it does not, and the…
Does a peptide degrade silently, with no visual change? Replied, post #60 · Practice › Storage & stability · 1 Jul 2026 · 0 likes Answering the question post #56 raises rather than the one it answers. Clarity is a weak test. A solution can lose a significant fraction of its active content to…
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #65 · Analytics › Method validation · 24 Jun 2026 · 13 likes Range: the concentration range over which the method has been validated. Going outside the validated range is going outside the method's demonstrated performance.
Follow-up: Search filters: what is missing Replied, post #128 · Meta › Site feedback · 13 Jun 2026 · 3 likes What I want from this Search filters thread is the list of things that would need to be true for the claim to hold. If we can write that list, we can check it.
How shortages have affected compounding permissions — does this still hold? Replied, post #11 · Access › Shortages · 9 Jun 2026 · 0 likes Thank you — that answers what I came here to find out.
Follow-up: The most useful thing you learned here that was not the answer you came for Replied, post #3 · Lounge › Off topic · 5 Jun 2026 · 3 likes Lounge-level thought to close on: the measure of this place is that being wrong in public here is cheap. That is a design decision and it took work. Genuinely open to…
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #28 · Practice › Storage & stability · 3 Jun 2026 · 1 like I read post #24 twice before replying, because I had assumed the opposite. Agreed on reconstituted, with one qualification that I think matters. The reasoning holds for…
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #6 · Sourcing › Red flags · 2 Jun 2026 · 11 likes Taking post #5 at face value and following it one step further. Reporting something here requires the batch, the date, the method and the document, which is exactly…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #75 · Sourcing › Vendor reports · 30 May 2026 · 31 likes Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water, counter-ion, and excipient. Purity and content are…
Run-in periods and the population they select Replied, post #125 · Evidence › Trials · 27 May 2026 · 8 likes I read post #121 twice before replying, because I had assumed the opposite. One caution on run-in periods: everything above assumes the underlying documentation is what…
Micro-titration: a disputed topic, argued properly — one year on Replied, post #38 · Practice › Dosing & titration · 19 May 2026 · 6 likes Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.
I have no scientific background — can I still follow the analytics categories? Replied, post #2 · Start Here › Welcome · 11 May 2026 · 0 likes Reading the guidelines before you post is genuinely worth the twenty minutes. Not because you will break one, but because the rules explain why the place reads the way…
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #11 · Practice › Reconstitution · 4 May 2026 · 5 likes Coming back to post #7, because the follow-up matters more than the original answer. The reason Reconstituting a multi-strength kit keeps being re-asked is that the…
Blind submission and why it changes minds — the long version Replied, post #35 · Sourcing › Independent verification · 22 Apr 2026 · 1 like Answering the question post #32 raises rather than the one it answers. Medutest: combined purity and identity reporting. Appears throughout vendor documentation. Where…
[2026 update] Thyroid function tests during substantial weight change Replied, post #36 · Clinical › Bloodwork · 11 Apr 2026 · 9 likes Post #34 and I disagree about the size of the effect, not about the direction. Fasting state: some lab tests require fasting; others do not. Lipids on a fasting draw…
Type 2 diabetes and the largest part of the evidence base Replied, post #60 · Clinical › Comorbidities · 8 Apr 2026 · 1 like Where the honest answer is "nobody knows", giving it plainly is more useful than a confident synthesis of mechanism and anecdote.
A single out-of-range value on an otherwise normal panel Replied, post #32 · Clinical › Bloodwork · 8 Apr 2026 · 0 likes An observation about single out-of-range value that I cannot explain and am posting anyway, on the principle that unexplained observations are more useful public than…
Fibre intake when total intake falls, and the constipation link — one year on Replied, post #3 · Nutrition & Training › Protein & intake · 28 Mar 2026 · 8 likes Adding the measurement that the opening post says would settle it. Tracking intake for a week rather than permanently is usually enough to find out whether there is a…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #62 · Research Methods › Statistics · 26 Mar 2026 · 1 like Useful. I have added it to my own notes with the date on it.
Coming back to: Time to steady state after a dose increase Replied, post #20 · Pharmacology › Pharmacokinetics · 25 Mar 2026 · 20 likes Everything in post #16 holds. The case it does not cover is the one I have. The time to maximum concentration after a subcutaneous dose in this class is measured in…
Coming back to: Washout: how long is long enough, and for what purpose Replied, post #80 · Pharmacology › Pharmacokinetics · 23 Mar 2026 · 0 likes Filing a mild objection to the consensus on Washout. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit.
[2026 update] Distinguishing expected GI effects from something that needs urgent… Replied, post #14 · Practice › Side effects · 22 Mar 2026 · 16 likes Fair, and the limits you put on it are the part I will remember.
Second pass at: Metformin co-administration and additive GI effects Replied, post #66 · Practice › Interactions · 14 Mar 2026 · 0 likes Metformin co-administration is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
Coming back to: Training through a dose escalation week Replied, post #48 · Nutrition & Training › Resistance training · 10 Mar 2026 · 26 likes Cardio and resistance: the interaction between energy-intense cardiovascular training and resistance training is real. Moderate cardio is fine; excessive endurance…
Second pass at: What pooling buys you and what it destroys Replied, post #23 · Evidence › Meta-analyses · 2 Mar 2026 · 12 likes Two sentences on pooling buys and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What is…
The lowest dose that does anything: is that a real question? Replied, post #11 · Practice › Dosing & titration · 1 Mar 2026 · 21 likes I had written a reply contradicting post #7 and deleted it. Here is what survived. Going back down a step is not a failure and the trials allowed it. Several protocols…
[2026 update] Reading a supplementary appendix and finding the interesting part Replied, post #40 · Evidence › Trials · 18 Feb 2026 · 16 likes Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation method (was it truly random or could someone predict the next assignment),…
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #10 · Compounds › Tirzepatide · 8 Feb 2026 · 0 likes This follows post #9 rather than contradicting it. The published pharmacokinetics show dose proportionality across the studied range, which means dose arithmetic…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #7 · Start Here › Welcome · 29 Jan 2026 · 29 likes If you are not sure which subcategory a question belongs in, post it in the closest one. A moderator will move it, the move is logged, and nothing bad happens to you.
The nausea timeline across the first four weeks, with a tabulated log — what changed since Replied, post #27 · Practice › Side effects · 16 Jan 2026 · 13 likes This follows post #24 rather than contradicting it. Reading back through the nausea timeline threads from last year, the same three questions come up every time and…
Vomiting: when it is expected and when it is a reason to stop Replied, post #13 · Practice › Side effects · 26 Dec 2025 · 25 likes The practical division worth making is between symptoms that are unpleasant, symptoms that are limiting, and symptoms that are a reason to stop and get assessed. They…
Airline travel with a temperature-sensitive injectable Replied, post #24 · Devices › Cold chain · 21 Dec 2025 · 0 likes The practical question after a warm arrival is what to do, and there is no test at home that answers it. Independent testing is the only route to an actual answer. The…
Second pass at: Programming during a large energy deficit Replied, post #77 · Nutrition & Training › Resistance training · 12 Nov 2025 · 0 likes Answering the question post #73 raises rather than the one it answers. Maintenance phases are where most people report training going best, which is unsurprising and is…
Documentation that appears only after payment Replied, post #66 · Sourcing › Red flags · 3 Nov 2025 · 0 likes The most useful contribution to this subcategory is a resolved case written up with the resolution, because the unresolved ones are all anyone remembers. It is worth…
Pooling trials with different estimands — what changed since Replied, post #33 · Evidence › Meta-analyses · 5 Oct 2025 · 1 like Fixed-effect and random-effects models answer different questions. The first assumes one true effect; the second assumes a distribution of them. Choosing between them…
Compounds this community declines to help with, and why Replied, post #57 · Compounds › Other compounds · 4 Oct 2025 · 29 likes The arithmetic in post #56 is right; the assumption feeding it is the part to check. Where a compound has a legitimate pharmaceutical form somewhere in the world, the…
A preprint whose numbers changed substantially at publication Replied, post #77 · Evidence › Preprints · 3 Oct 2025 · 0 likes Narrowing post #74, because the general version has more than one answer. Say it is a preprint in the first line rather than the last. Everything downstream depends on…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #93 · Practice › Side effects · 25 Sep 2025 · 31 likes Grateful for the specificity. Vague answers to this question are what sent me looking.
A request that was declined, and the reasoning — a second dataset Replied, post #48 · Documentation › Wiki requests · 10 Aug 2025 · 20 likes Requests for a document covering something the evidence does not support get declined, and the decline usually points at what could be written instead. Worth reading…
Hepatic impairment and the absence of data Replied, post #7 · Clinical › Special populations · 5 Aug 2025 · 0 likes Summarising the hepatic impairment thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and…
Canadian access and provincial variation — one year on Replied, post #18 · Regional › North America · 22 Jul 2025 · 2 likes Pharmacy practice varies between pharmacies within the same city, so two honest accounts can be entirely different.
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #83 · Compounds › Retatrutide · 22 Jul 2025 · 8 likes Confirming post #80 from a second method, which matters more than confirming it from a second person. The claim about Triple agonism upthread is stronger than its…
Why "any advice?" is the least effective ending for a post — the long version Replied, post #27 · Start Here › How to Ask · 20 Jul 2025 · 11 likes Adding the measurement that post #24 says would settle it. Arithmetic questions: write out the steps. "I have a 10 mg vial, I added 2 mL, I want a 0.25 mg dose, and I…
Retatrutide phase 2 in type 2 diabetes: the Lancet paper Replied, post #14 · Compounds › Retatrutide · 29 Jun 2025 · 0 likes Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is ongoing, and the heart-rate signal in phase 2 is not negligible.…
Counter-ion content and its effect on measured mass Replied, post #69 · Analytics › Mass spectrometry · 19 Jun 2025 · 7 likes On counter-ion content, I would rather understate and be corrected upward than overstate and be quoted. That is a house style here and it is a good one.
Insulin combinations and hypoglycaemia risk Replied, post #12 · Practice › Interactions · 18 Jun 2025 · 3 likes The most defensible general position in this subcategory: identify the plausible mechanism, check whether it has been studied, and where it has not, say that rather…
Follow-up: Tracking intake honestly when appetite is absent Replied, post #36 · Nutrition & Training › Protein & intake · 7 Jun 2025 · 0 likes Coming back to post #34, because the follow-up matters more than the original answer. The practical problem is that appetite suppression makes hitting a target…
Follow-up: What other technical communities get right that we do not Replied, post #121 · Lounge › Off topic · 5 Jun 2025 · 10 likes Analytics first, in my case, and I still find the practice category the harder read. Chromatography has one right answer more often than logistics does.
Follow-up: How much fluid is actually needed, and how you would know Replied, post #16 · Nutrition & Training › Hydration & electrolytes · 24 May 2025 · 29 likes Where there is a genuine question, a measurement answers it and a supplement does not. Blood tests for the common electrolytes are routine and cheap. I am confident…
Documenting a supplier's response to a discrepancy — does this still hold? Replied, post #40 · Sourcing › Vendor reports · 31 Mar 2025 · 6 likes Pattern across lots: a single result is a data point. Three or four results from the same supplier showing a consistent pattern becomes a record worth discussing. Two…
Validating a method you did not develop — does this still hold? Replied, post #120 · Analytics › Method validation · 15 Mar 2025 · 4 likes The arithmetic in post #117 is right; the assumption feeding it is the part to check. A method that reports the same number for every lot is worth a second look. Real…
Charge states for a 4 kDa peptide, worked through Replied, post #19 · Analytics › Mass spectrometry · 4 Mar 2025 · 28 likes Post #15 put the caveat in the right place and I want to underline it. An observation about charge states that I cannot explain and am posting anyway, on the principle…
Scheduled maintenance and what will be unavailable Replied, post #59 · Meta › Announcements · 2 Mar 2025 · 0 likes Picking up post #58: that is the part I would want checked first. Scheduled maintenance sits at the boundary between what this community can usefully discuss and what…
Requesting a page: what makes a good request Replied, post #2 · Documentation › Wiki requests · 16 Feb 2025 · 11 likes Flag a page that has drifted: if you notice a maintained page has information that is outdated (dates that have passed, regulatory changes, new evidence) post a flag so…
Coming back to: Official shortage notices and what they authorise Replied, post #12 · Access › Shortages · 11 Feb 2025 · 1 like Shortages end and the notices are updated. Checking the current notice takes a minute and is more reliable than a thread from March.
Why mass spectrometry cannot tell you about an epimer Replied, post #48 · Analytics › Mass spectrometry · 5 Feb 2025 · 27 likes Trifluoroacetate adducts are common in material purified with TFA and are one reason a mass spectrum from a peptide can look busier than expected.
[2026 update] Lipid changes during rapid weight loss: the expected trajectory Replied, post #35 · Clinical › Bloodwork · 28 Jan 2025 · 2 likes Glycaemic markers integrate over different periods. A point glucose and a longer-term marker disagreeing is not a contradiction; it is two different questions. Reading…
Anxiety in the first weeks: drug, situation, or both Replied, post #41 · Wellbeing › Mental health · 22 Jan 2025 · 0 likes Two questions I would want answered before drawing anything from the anxiety data above: how were the cases selected, and what happened to the ones that dropped out.
Reading a supplementary appendix and finding the interesting part Replied, post #68 · Evidence › Trials · 15 Jan 2025 · 1 like Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
How compounding permissions changed when supply normalised Replied, post #4 · Sourcing › Regulatory · 29 Dec 2024 · 21 likes Everything in the opening post holds. The case it does not cover is the one I have. An indication approved for one age range does not extend to another, and paediatric…
Research-use-only status: what it means legally and practically — a second dataset Replied, post #37 · Compounds › Other compounds · 10 Dec 2024 · 2 likes Building on post #34 rather than restating it. Practical answer on Research-use-only status, since the theoretical one is upthread: do the simplest check first, write…
What a seizure notice actually says Replied, post #14 · Sourcing › Logistics · 8 Dec 2024 · 0 likes Reading back through, this was answered upthread and I missed it. My fault.
Fixed versus detachable needles: the trade-offs Replied, post #27 · Devices › Syringes & needles · 1 Dec 2024 · 5 likes Narrowing post #26, because the general version has more than one answer. Distinguishing three things in the fixed versus detachable needles discussion that keep…
Over-dilution: when your dose falls below one readable graduation Replied, post #8 · Practice › Reconstitution · 21 Nov 2024 · 30 likes Where I part company with post #4, and it is a narrow parting. Distinguishing three things in the over-dilution discussion that keep getting used interchangeably: the…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #45 · Compounds › Other compounds · 12 Oct 2024 · 13 likes Building on post #44 rather than restating it. Trying to state the Melanocortin agonists position in a way that someone who disagrees would recognise as fair, because I…
Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #53 · Evidence › Journal club · 24 Sep 2024 · 14 likes SELECT (N Engl J Med 2023): Semaglutide cardiovascular outcomes without diabetes. The first outcome trial in people without diabetes, which decoupled the cardiovascular…
Correlation in a self-tracked dataset: what it can support Replied, post #78 · Research Methods › Statistics · 23 Aug 2024 · 8 likes Everything in post #76 holds. The case it does not cover is the one I have. Baseline imbalance in a randomised trial is expected by chance and adjusting for it post hoc…
Assessing a warm arrival: the decision process — one year on Replied, post #93 · Sourcing › Logistics · 1 Jun 2024 · 14 likes Adding the measurement that post #90 says would settle it. Anyone deciding whether a delay is a problem should ask what would change if they waited another week.…