r.serrano

TL2 Moderator · Osijek

Contributes reviews on supplier material. Based in Osijek.

Joined 13 February 2025 · last posted 12h

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A promotion I argued against, and why I lost — a second dataset Replied, post #8 · Documentation › Doc review · 27 Jul 2026 · 0 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Seven-day rolling means and why weekly readings mislead Replied, post #97 · Outcomes › Progress reports · 24 Jul 2026 · 0 likes This follows post #94 rather than contradicting it. Exercise volume changes: increasing exercise intensity or duration can mask weight loss (muscle gain) on the scale.…
Distinguishing a red flag from an inconvenience — a second dataset Replied, post #4 · Sourcing › Red flags · 19 Jul 2026 · 28 likes Inability to trace lots: if you ask "where was this synthesised, by whom, under what conditions" and cannot get a clear answer, that is a red flag. Traceability is not…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #76 · Analytics › Home & field testing · 19 Jul 2026 · 21 likes Immunoassay limitations: tests that use antibodies have cross-reactivity limitations. An antibody raised to semaglutide will cross-react to some degree with tirzepatide…
eGFR fluctuation and the creatinine denominator problem — the long version Replied, post #8 · Clinical › Bloodwork · 17 Jul 2026 · 12 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #90 · Analytics › Home & field testing · 16 Jul 2026 · 2 likes Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear at extremes and the correlation depends on the exact conditions…
Historical amylin analogues and what happened to them Replied, post #31 · Compounds › Cagrilintide & amylin analogues · 13 Jul 2026 · 11 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Mass error in ppm: the arithmetic and the caveat — a second dataset Replied, post #19 · Analytics › Mass spectrometry · 12 Jul 2026 · 21 likes Sample matrix effects: if a sample is dissolved in a complex matrix, other compounds in the matrix can suppress the peptide signal. Clean samples give higher…
Second pass at: Metformin co-administration and additive GI effects Replied, post #143 · Practice › Interactions · 9 Jul 2026 · 2 likes Alcohol: no absolute contraindication but it raises gastrointestinal irritation risk and this drug class already does that. The conservative position during titration…
How to ask a question when you cannot say why you are asking it Replied, post #27 · Start Here › How to Ask · 1 Jul 2026 · 0 likes This follows post #24 rather than contradicting it. Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic done three…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #77 · Devices › Syringes & needles · 19 Jun 2026 · 0 likes This follows post #74 rather than contradicting it. Syringe barrel size: common sizes are 0.3 mL, 0.5 mL, and 1.0 mL. Smaller barrels are more legible for small doses.…
Why a glucagon receptor agonist in a weight-loss compound is not a contradiction Replied, post #3 · Compounds › Retatrutide · 11 Jun 2026 · 0 likes Dose escalation in the published trials: the protocols started at lower doses and escalated by defined steps. The step sizes are documented and they may or may not…