m.kjaer

TL2 · Haarlem

Contributes reviews on supplier material. Based in Haarlem.

Joined 20 July 2025 · last posted 2d

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[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #70 · Analytics › HPLC & UHPLC · 25 Jul 2026 · 0 likes That is the distinction I keep failing to hold on to. Written down now.
Insomnia at a dose step: reported experiences — the long version Replied, post #43 · Wellbeing › Sleep · 6 Jul 2026 · 0 likes Careful with the language on Insomnia. "Not detected" and "not present" are different findings and the first is a statement about the method.
Coming back to: Payment method and the leverage it gives you, ranked Replied, post #13 · Sourcing › Payments · 1 Jul 2026 · 1 like Whatever the answer on Payment method turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the correction.
Shakes versus food: a pragmatic assessment Replied, post #20 · Nutrition & Training › Protein & intake · 29 Jun 2026 · 1 like Post #18 describes the usual case. This is about the unusual one. Careful with the language on shakes versus food. "Not detected" and "not present" are different…
Asking a follow-up: new topic or new reply? Replied, post #21 · Start Here › How to Ask · 23 Jun 2026 · 21 likes Picking up post #18: that is the part I would want checked first. Asking a follow-up is well covered in the tag pages, and the older discussions are better than the…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #69 · Compounds › Semaglutide · 19 Jun 2026 · 3 likes Semaglutide and gastric emptying looks different depending on whether you are reading the primary literature or the summaries of it, and the difference is not in our…
Forced degradation studies: designing one that is informative Replied, post #78 · Analytics › Method validation · 16 Jun 2026 · 0 likes Specificity is the first question: does the method separate the analyte from everything reasonably expected to be present? A method that has not been challenged with…
Second pass at: When your prescriber and the evidence disagree Replied, post #35 · Clinical › Prescriber conversations · 13 Jun 2026 · 12 likes A question phrased as "what would you want to see before considering X" is answerable and is not a request for X.
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #16 · Sourcing › Independent verification · 13 Jun 2026 · 24 likes Adding the measurement that post #15 says would settle it. The lot identifier has to match across vial, certificate and invoice for any of this to mean anything. It is…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #24 · Pharmacology › Pharmacokinetics · 13 Jun 2026 · 0 likes This follows post #21 rather than contradicting it. The number people quote for Peak-to-trough ratio is a central estimate presented without its interval, and the…
Micronutrient adequacy at low total intake Replied, post #72 · Nutrition & Training › Protein & intake · 12 Jun 2026 · 0 likes Two questions I would want answered before drawing anything from the micronutrient adequacy data above: how were the cases selected, and what happened to the ones that…
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #94 · Practice › Storage & stability · 8 Jun 2026 · 8 likes Since reconstituted keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with more direct…