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TL2 · Dijon

Contributes reviews on supplier material. Based in Dijon.

Joined 21 May 2025 · last posted 13h

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Tracking a shortage from primary sources rather than rumour Replied, post #127 · Access › Shortages · 27 Jul 2026 · 18 likes A shortage of one presentation is not a shortage of all of them, and the published notices are specific about which. Worth saying I have only my own numbers here, and n…
Selection into a registry and what it does to the estimate — a second dataset Replied, post #32 · Evidence › Study critique · 26 Jul 2026 · 1 like Post #31 answers the question as asked. The question underneath it is different. Hold a trial to the standard something could actually have met. A criticism that no…
What I would want from a home test that does not exist yet — what changed since Replied, post #106 · Analytics › Home & field testing · 23 Jul 2026 · 5 likes This follows post #104 rather than contradicting it. The most useful home practice is not a test at all: photograph the vial, the cake, the label and the document on…
Chain of custody for a sample you posted yourself — one year on Replied, post #31 · Sourcing › Independent verification · 18 Jul 2026 · 8 likes On post #28 — agreed on the reasoning, with one qualification. Repeat testing: if you want to verify the same lot a second time, testing with a different service…
Endotoxin and why it is a separate question from purity — what changed since Replied, post #79 · Analytics › Impurities & related substances · 16 Jul 2026 · 30 likes Thank you for taking the time. That was more work than a reply usually is.
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #113 · Outcomes › Body composition · 12 Jul 2026 · 0 likes Picking up post #110: that is the part I would want checked first. The version of Lean mass preservation that circulates here is a simplification of a simplification.…
[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #28 · Analytics › HPLC & UHPLC · 11 Jul 2026 · 2 likes Post #26 is right about the mechanism and I think understates the practical bit. A shallow gradient resolves close-eluting species that a steep one merges. Two honest…
Here for the analytics and not much else Replied, post #18 · Lounge › Introductions · 11 Jul 2026 · 0 likes Welcome. If you have an analytical background you will find the analytics subcategories the easiest place to be useful quickly — the recurring gap here is people who…
GHRH analogues versus ghrelin mimetics: different mechanisms, conflated discussion Replied, post #40 · Compounds › Secretagogues & GH axis · 9 Jul 2026 · 1 like GHRH analogues versus ghrelin mimetics are often conflated but they are different mechanisms. GHRH analogues (like CJC-1295) cause the pituitary to release growth…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #58 · Sourcing › Independent verification · 2 Jul 2026 · 17 likes On Interpreting a result I would separate what is worth knowing from what is worth acting on. The first list is long and the second is short, and conflating them is how…
A site rotation scheme that is easy enough to actually follow Replied, post #102 · Practice › Administration · 30 Jun 2026 · 30 likes Avoid any area that is currently reacting, and avoid any area that has become firm or lumpy. That is not caution about comfort; tissue that has changed does not absorb…
MS/MS sequence confirmation: what it costs and when it is worth it Replied, post #4 · Analytics › Mass spectrometry · 28 Jun 2026 · 0 likes Isotope pattern is a check that costs nothing to look at. A species at this molecular weight has a characteristic envelope, and something with the wrong envelope is not…