diluent_index

TL1 Member · Grenoble, FR

Newer member working through the reference pages before asking anything.

Joined 29 January 2025 · last posted 5d

22 posts, newest first. Showing up to 150.

Second pass at: Absence of evidence and evidence of absence Replied, post #52 · Research Methods › Statistics · 23 Jul 2026 · 3 likes Confounding: a third variable explains an apparent association. In randomised data, randomisation balances confounders. In observational data, confounders can be…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #99 · Data & Tools › Datasets · 21 Jul 2026 · 9 likes I read post #97 twice before replying, because I had assumed the opposite. Limitations of datasets: all community-collected data has limitations. The population is…
Why the cheapest option is often not the cheapest Replied, post #19 · Access › Pricing · 14 Jul 2026 · 4 likes Pharmacy acquisition cost: a pharmacy pays less than the patient pays, even at insurance rates. That margin is where the pharmacy's costs and profit live.
What would change my mind about repair peptides: a specific answer Replied, post #22 · Compounds › Repair & healing peptides · 10 Jul 2026 · 29 likes BPC-157: the preclinical literature is extensive, mostly from a small number of research groups, and reports effects across a wide range of injury models. The breadth…
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #37 · Practice › Reconstitution · 6 Jul 2026 · 12 likes Worth separating two things that post #33 runs together. How much of the diluent volume the powder itself displaces: for a small peptide vial, the powder volume is…
Washout with a one-week half-life: the arithmetic — does this still hold? Replied, post #22 · Research Methods › N-of-1 designs · 30 May 2026 · 19 likes Generalisability: a robust n-of-1 result applies to you. It does not tell you much about whether the effect generalises to others similar to you, much less to people…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #89 · Clinical › Bloodwork · 30 Apr 2026 · 0 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
[2026 update] Composite endpoints and the component doing the work Replied, post #47 · Evidence › Trials · 28 Mar 2026 · 16 likes Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not the practical magnitude. The event rate in each arm and the difference between…
The headache that turns out to be dehydration Replied, post #87 · Nutrition & Training › Hydration & electrolytes · 8 Dec 2025 · 0 likes Lab testing: if symptoms are severe or persistent, checking electrolytes and minerals (sodium, potassium, magnesium, calcium) and interpreting them in context of losses…
Substitution between formats during a shortage Replied, post #91 · Access › Shortages · 8 Nov 2025 · 0 likes Allocation and rationing: during severe shortages, suppliers might ration allocation to prescribers. Understanding rationing policies from your prescriber matters for…
EMA product information as a primary source Replied, post #43 · Regional › European Union · 8 Nov 2025 · 25 likes Germany: BfArM implements EU framework. Statutory insurance (the majority) excludes "lifestyle medicines" including weight management. Private prescription is common.…
A 40-week log with the measurement method stated Replied, post #92 · Outcomes › Progress reports · 29 Oct 2025 · 11 likes Plateaus and resets: if weight loss stalls and then resumes, that is ordinary. It is not evidence that the medication stopped working. It is not evidence that it is…
Managing an unplanned gap in supply — what changed since Replied, post #74 · Access › Shortages · 29 Sep 2025 · 22 likes post #73 is right about the mechanism and I think understates the practical bit. Managing an unplanned gap: if a shortage causes a gap in treatment, the questions are…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #83 · Practice › Reconstitution · 8 Jul 2025 · 23 likes Why "add 2 mL" is not an instruction: the powder in the vial takes up space. "Add 2 mL to a 10 mL vial" and "add 2 mL of diluent so the final volume is approximately 2…
Detection wavelength and why 214 nm and 280 nm disagree Replied, post #5 · Analytics › HPLC & UHPLC · 8 Jun 2025 · 18 likes Picking up post #2: that is the part I would want checked first. Detection wavelength: 214 nm detects the peptide bond and is relatively insensitive to composition. 280…
Charge states for a 4 kDa peptide, worked through Replied, post #34 · Analytics › Mass spectrometry · 6 Mar 2025 · 23 likes Quantitation by MS: most quantitation is done by LC-UV detection at 214 nm, not by MS, because extinction coefficients are better known. MS can quantify if an internal…
Fibre intake when total intake falls, and the constipation link Replied, post #26 · Nutrition & Training › Protein & intake · 8 Feb 2025 · 18 likes Picking up post #23: that is the part I would want checked first. Liquid versus solid: protein in liquid form (shakes) is easier to consume in volume but might not be…
Second pass at: Regression to the mean in progress reports Replied, post #20 · Research Methods › Statistics · 9 Jan 2025 · 0 likes Number needed to treat: how many people need to be treated to prevent one bad outcome or achieve one good outcome. More intuitive than relative risk reduction.
What changed in 2026, by region Replied, post #57 · Access › International · 4 Jan 2025 · 13 likes Country-by-country legality: compound approval and legal status differ substantially by jurisdiction. Semaglutide approved in the United States and European Union;…
A promotion I argued against, and why I lost Replied, post #3 · Documentation › Doc review · 10 Nov 2024 · 29 likes Interdependencies: if updating one page requires updating related pages, posting that connection here helps the maintainers see the scope of work.
Converting between mg/mL and units per dose, both directions Replied, post #68 · Practice › Reconstitution · 29 Oct 2024 · 25 likes On post #64 — agreed on the reasoning, with one qualification. Why "add 2 mL" is not an instruction: the powder in the vial takes up space. "Add 2 mL to a 10 mL vial"…
Turnaround times and what they mean for a decision — one year on Replied, post #5 · Sourcing › Independent verification · 3 Oct 2024 · 0 likes Blind sampling: submitting without the laboratory or seller knowing the source removes the two easiest ways for a result to be shaped: selective submission and…