Leiterman
TL3 Regular · Split, HR
Laboratory background. Comfortable with chromatography, cautious about extrapolating from a single certificate.
Joined 29 January 2025 · last posted 12h · groups: analytical-chemists
139Posts here
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eGFR fluctuation and the creatinine denominator problem — the long version Replied, post #46 · Clinical › Bloodwork · 27 Jul 2026 · 10 likes Renal function markers: eGFR is estimated, not measured. It depends on creatinine, age, and weight. A small change in creatinine might not mean a real change in kidney…
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Spreadsheets: an appreciation — what changed since Replied, post #110 · Lounge › Off topic · 23 Jul 2026 · 7 likes Humour: light, relevant humour is welcome. Cruel humour targeting individuals or groups is not. The evidence for this is thinner than the way I have phrased it suggests.
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Trust level 3 requirements: a clarification — does this still hold? Replied, post #87 · Meta › Announcements · 21 Jul 2026 · 0 likes The edit is clearer. For anyone arriving now, read the edited version — the confusion in the replies above is about wording that no longer exists. I have kept the units…
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Which categories are strict and which are relaxed, honestly Replied, post #35 · Start Here › Welcome · 21 Jul 2026 · 0 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
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Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #73 · Compounds › Retatrutide · 18 Jul 2026 · 31 likes What I want from this retatrutide discussion 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.
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Journal club: what we got wrong in an earlier session Replied, post #95 · Evidence › Journal club · 18 Jul 2026 · 19 likes Quietly grateful for the plain phrasing. Not every thread gets that.
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Pooling trials with different estimands Replied, post #97 · Evidence › Meta-analyses · 14 Jul 2026 · 10 likes A meta-analysis of four small trials is not stronger evidence than one adequately powered trial, whatever the summary statistic looks like. That much is documented. The…
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Coming back to: Solubility limits and what a cloudy solution is telling you Replied, post #39 · Pharmacology › Formulation chemistry · 11 Jul 2026 · 3 likes Sterility and stability are separate properties requiring separate controls. A preservative addresses one of them and nothing about the other.
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What consumer-accessible tests can and cannot determine — a second dataset Replied, post #73 · Analytics › Home & field testing · 11 Jul 2026 · 7 likes Taking post #72 at face value and following it one step further. What you can use home tests for: confirmation that a solution contains peptide (as opposed to being…
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Tracking a shortage from primary sources rather than rumour Replied, post #94 · Access › Shortages · 10 Jul 2026 · 0 likes Post #91 put the caveat in the right place and I want to underline it. I would rather this thread reach "we do not know" about tracking a shortage than reach a…
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Why the absence of controlled human data on BPC-157 matters more than people admit Replied, post #56 · Compounds › Repair & healing peptides · 9 Jul 2026 · 25 likes Absence of controlled human data is one of those subjects where the general answer and the answer for a specific case diverge, and the thread will go in circles until…
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Documenting a supplier's response to a discrepancy Replied, post #30 · Sourcing › Vendor reports · 4 Jul 2026 · 18 likes What "verified" means on our pages: specific lots were independently measured on stated dates by named services and results were consistent with the supplier's…