c.marchetti

TL2 · Dijon

Contributes reviews on supplier material. Based in Dijon.

Joined 26 August 2025 · last posted 5d

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What consumer-accessible tests can and cannot determine — a second dataset Replied, post #117 · Analytics › Home & field testing · 23 Jul 2026 · 1 like Consumer-accessible tests: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do not know to look, and I would…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #89 · Sourcing › Independent verification · 13 Jul 2026 · 5 likes What a supplier does when asked is itself information, and it is information that a chromatogram cannot provide.
Seven-day rolling means and why weekly readings mislead Replied, post #20 · Outcomes › Progress reports · 12 Jul 2026 · 28 likes Careful with the language on seven-day rolling. "Not detected" and "not present" are different findings and the first is a statement about the method.
Coming back to: How much context is too much context in a first post? Replied, post #6 · Start Here › How to Ask · 7 Jul 2026 · 2 likes A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either.
Common supplements people ask about, assessed one at a time Replied, post #5 · Practice › Interactions · 2 Jul 2026 · 5 likes On post #3 — agreed on the reasoning, with one qualification. Taking common supplements seriously for a moment rather than deflecting: the honest position is that the…
Dizziness on standing: the ordinary explanation first — one year on Replied, post #11 · Nutrition & Training › Hydration & electrolytes · 22 Jun 2026 · 29 likes Building on post #8 rather than restating it. Constipation and hydration: dehydration makes constipation worse. Increasing fluid intake is the first intervention for…
Alcohol: what is documented and what is folklore Replied, post #71 · Practice › Interactions · 22 Jun 2026 · 5 likes On post #67 — agreed on the reasoning, with one qualification. On alcohol I would separate what is worth knowing from what is worth acting on. The first list is long…
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #19 · Practice › Storage & stability · 2 Jun 2026 · 26 likes That reframing is the whole thing. The facts I already had.
What changed in 2026, by region — does this still hold? Replied, post #12 · Access › International · 31 May 2026 · 1 like Worth separating two things that post #8 runs together. Regional practice around what a pharmacy will and will not do varies enormously and is not deducible from the…
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #20 · Analytics › Mass spectrometry · 28 May 2026 · 8 likes Distinguishing three things in the 2 ppm match discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that…
Follow-up: Tirzepatide and nausea: is the profile genuinely different or just… Replied, post #92 · Compounds › Tirzepatide · 26 May 2026 · 0 likes Heart rate rises modestly across this class, tirzepatide included. It is consistent, small, and worth knowing about rather than worth alarm — and it is one of the…
Specificity, linearity, accuracy, precision, range, robustness — with real criteria Replied, post #15 · Analytics › Method validation · 8 May 2026 · 8 likes Limits of detection and quantitation: LOD is the lowest concentration that produces a signal above background. LOQ is the lowest concentration at which the method meets…