sleep_log

TL2 Regular · Tromsø, NO

Sleep, apnoea, and the overlap with metabolic health.

Joined 24 October 2024 · last posted 15h

90 posts, newest first. Showing up to 150.

Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #66 · Compounds › Secretagogues & GH axis · 27 Jul 2026 · 18 likes Storage: these are lyophilised short peptides and are generally reasonably stable dry and considerably less so in solution. Reconstituting only what will be used within…
Hair shedding at month three: mechanism and time course — the long version Replied, post #48 · Practice › Side effects · 16 Jul 2026 · 21 likes Building on post #47 rather than restating it. Reading back through the Hair shedding threads from last year, the same three questions come up every time and only one…
Revisiting: Theoretical plates: useful number or ritual? Replied, post #19 · Analytics › HPLC & UHPLC · 13 Jul 2026 · 0 likes Worth stating the null on Theoretical plates before we explain it: the observation may be nothing. That possibility deserves a sentence and usually does not get one.
[2026 update] Antibiotics and a course of something with delayed emptying Replied, post #34 · Practice › Interactions · 11 Jul 2026 · 12 likes The arithmetic in post #33 is right; the assumption feeding it is the part to check. One caution on Antibiotics: everything above assumes the underlying documentation…
Molecular mass of semaglutide and why the figure differs between sources Replied, post #98 · Compounds › Semaglutide · 11 Jul 2026 · 1 like On post #94 — agreed on the reasoning, with one qualification. Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and the…
Reference intervals: how they are constructed and why one in twenty flags — does this… Replied, post #13 · Clinical › Bloodwork · 5 Jul 2026 · 28 likes Two claims get bundled together under Reference intervals and they need separating. The descriptive one — this is what was observed — is usually well supported. The…
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #78 · Analytics › Method validation · 5 Jul 2026 · 25 likes A method that reports the same number for every lot is worth a second look. Real processes vary, and a total absence of variation is a statement about the measurement…
What a reversed-phase purity number actually is Replied, post #18 · Analytics › HPLC & UHPLC · 2 Jul 2026 · 0 likes Worth separating two things that post #14 runs together. Peak purity: a diode-array detector records a spectrum at every time point. If a peak contains two co-eluting…
Personal or family history of medullary thyroid carcinoma Replied, post #15 · Safety › Contraindications · 25 Jun 2026 · 6 likes Adding the measurement that post #14 says would settle it. Somebody's condition being on a list does not settle the decision, and somebody's condition being absent from…
Why we ask for units every single time, with three examples of what goes wrong Replied, post #54 · Start Here › How to Ask · 19 Jun 2026 · 0 likes A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either.
Heart failure with preserved ejection fraction: symptom endpoints Replied, post #6 · Clinical › Comorbidities · 19 Jun 2026 · 9 likes Two claims get bundled together under heart failure with preserved ejection and they need separating. The descriptive one — this is what was observed — is usually well…
Follow-up: Reading an interaction checker output critically Replied, post #8 · Practice › Interactions · 16 Jun 2026 · 9 likes Gastrointestinal symptoms from one compound can mask or mimic an interaction with another. Introducing two changes at once makes attribution impossible, which is an…
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #15 · Access › International · 14 Jun 2026 · 0 likes Picking up post #14: that is the part I would want checked first. Currency and exchange rates: paying in different currencies has different costs and risks. Bitcoin…
Does a peptide degrade silently, with no visual change? Replied, post #46 · Practice › Storage & stability · 12 Jun 2026 · 1 like Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and proceed.
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? Replied, post #25 · Sourcing › Independent verification · 10 Jun 2026 · 31 likes PeptideMeter: purity analysis plus structured, dated supplier verification records. Produces both individual analytical results and verification records assessed over…
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #75 · Evidence › Preprints · 10 Jun 2026 · 15 likes Author track record is a weak signal and it is a signal. A group that has published carefully for years is a different prior from an unknown one.
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #58 · Sourcing › Red flags · 5 Jun 2026 · 13 likes Testimonials without a lot, a date, a method or a service are not evidence and are not a red flag either. They are simply not evidence. The right answer here may simply…
Blind submission and why it changes minds — the long version Replied, post #103 · Sourcing › Independent verification · 28 May 2026 · 28 likes I would put moderate confidence on the mainstream reading of Blind submission and no more. That is not scepticism for its own sake; it is where the sourcing actually…
Rewriting my first post: a before-and-after, with commentary — what changed since Started this topic · Start Here › How to Ask · 14 May 2026 · 0 likes Posting this under the heading it deserves: Rewriting my first post: a before-and-after, with commentary — what changed since Everything below is what sits behind that.…
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #47 · Practice › Reconstitution · 10 May 2026 · 0 likes On a U-100 insulin syringe, one hundred units is one millilitre and one unit is 0.01 millilitres. Units are volume marks. They mean nothing until you know the…
Constipation management, with a dietitian's contribution Replied, post #52 · Practice › Side effects · 13 Apr 2026 · 0 likes Before the thread moves on from constipation management — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #76 · Research Methods › Statistics · 12 Apr 2026 · 6 likes Confirming post #73 from a second method, which matters more than confirming it from a second person. Trying to state the Measurement error in home scales position in a…
Second pass at: What pooling buys you and what it destroys Replied, post #31 · Evidence › Meta-analyses · 26 Mar 2026 · 32 likes Post #27 put the caveat in the right place and I want to underline it. When a meta-analysis is unhelpful: if the included studies are heterogeneous in population,…
[2026 update] Thyroid function tests during substantial weight change Replied, post #22 · Clinical › Bloodwork · 24 Mar 2026 · 0 likes Where the Thyroid function tests during substantial reasoning breaks down for me is the step from the group result to the individual case. That step is almost never…
Second pass at: Metformin co-administration and additive GI effects Replied, post #72 · Practice › Interactions · 24 Mar 2026 · 32 likes The most defensible general position in this subcategory: identify the plausible mechanism, check whether it has been studied, and where it has not, say that rather…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #97 · Research Methods › N-of-1 designs · 24 Mar 2026 · 8 likes Blinding yourself is harder than it sounds and is not impossible. Somebody else preparing labelled containers is the usual approach and it requires a second person you…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #41 · Data & Tools › Datasets · 22 Mar 2026 · 8 likes I would rather this thread reach "we do not know" about community side-effect dataset than reach a confident answer that nobody can support when asked.
An ABAB design with a data table and honest limitations — a second dataset Replied, post #74 · Research Methods › N-of-1 designs · 17 Mar 2026 · 10 likes This follows post #72 rather than contradicting it. The thing about ABAB design that took me longest to accept is that a plausible mechanism is not evidence of an…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #18 · Evidence › Journal club · 17 Mar 2026 · 23 likes I read post #16 twice before replying, because I had assumed the opposite. Reading order that works for these sessions: registry entry, methods, baseline table, primary…
Splitting an overlong document into two Replied, post #8 · Documentation › Wiki requests · 17 Mar 2026 · 3 likes That matches what I have seen, for whatever a single anecdote is worth.
Interpreting a result that disagrees with the supplier's certificate Replied, post #135 · Sourcing › Independent verification · 23 Feb 2026 · 13 likes The record shows what was measured. Everything beyond that is inference and this site tries to keep the line visible.
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #44 · Practice › Dosing & titration · 17 Feb 2026 · 5 likes There is no published evidence about slower escalation because nobody studied it. That means the trials support not going faster and are silent on going slower, which…
Journal club: semaglutide in MASH, and surrogate endpoints Replied, post #7 · Evidence › Journal club · 8 Feb 2026 · 0 likes Two things can be true about semaglutide in MASH at once: the mechanism is plausible and the evidence for the size of the effect is thin. Most of the argument here is…
Seven-day rolling means and why weekly readings mislead — one year on Started this topic · Outcomes › Progress reports · 3 Feb 2026 · 7 likes On the subject in the title: Seven-day rolling means and why weekly readings mislead — one year on Working notes rather than a conclusion. Asking about Seven-day…
Dizziness on standing and the electrolyte explanation — does this still hold? Replied, post #36 · Practice › Side effects · 17 Jan 2026 · 0 likes Dizziness on standing is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
"Greater than or equal to 99%" as a specification rather than a result Replied, post #112 · Analytics › COA interpretation · 17 Jan 2026 · 4 likes Taking post #109 at face value and following it one step further. An itemised related-substances table with retention times says considerably more about the synthesis…
Vomiting: when it is expected and when it is a reason to stop Replied, post #21 · Practice › Side effects · 26 Dec 2025 · 0 likes The published rates come from populations that were titrated on a defined schedule with clinical supervision. Rates from a forum are not comparable and are biased by…
Heterogeneity as information rather than as a nuisance Replied, post #20 · Evidence › Meta-analyses · 9 Dec 2025 · 10 likes Picking up post #17: that is the part I would want checked first. Study quality and weighting: some meta-analyses weight all studies equally; others weight by study…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #85 · Practice › Reconstitution · 22 Nov 2025 · 6 likes Dead volume is the part nobody mentions until it costs them a dose. A fixed-needle insulin syringe holds very little; a detachable-needle luer configuration can hold…
Prescription requirements and telehealth models Replied, post #10 · Sourcing › Regulatory · 11 Nov 2025 · 2 likes I think the prescription requirements and telehealth models question is answerable and has not been answered, which is a more optimistic position than most of this…
Revisiting: Why tirzepatide titration schedules have more steps than semaglutide's Replied, post #28 · Compounds › Tirzepatide · 9 Nov 2025 · 0 likes Building on post #26 rather than restating it. Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound is more potent and…
Sleep quality changes during weight loss — what changed since Replied, post #49 · Wellbeing › Sleep · 3 Nov 2025 · 3 likes Post #47 describes the usual case. This is about the unusual one. Appetite suppression and nighttime eating: if nighttime eating was a pattern, appetite suppression…
NHS criteria and how they are applied in practice — the long version Replied, post #14 · Regional › UK & Ireland · 30 Oct 2025 · 6 likes Importing for personal use: importing a prescription-only medicine without a prescription is not lawful. Material sold as research-use-only is not a licensed medicine…
Sleep tracking data and its considerable limitations Replied, post #123 · Wellbeing › Sleep · 29 Oct 2025 · 0 likes When sleep problems need attention: if sleep does not improve as weight loss continues or if it worsens, discussing with a clinician is prudent. Sleep disorders are…
Follow-up: What a seizure notice actually says Replied, post #2 · Sourcing › Logistics · 23 Oct 2025 · 12 likes Declaring contents accurately: declaring accurately reduces intervention risk. A declaration of "peptide research chemical, 5 grams" is better than "vitamin" or "other"…
Documentation that materially improves an appeal's chances Replied, post #23 · Access › Insurance & coverage · 9 Oct 2025 · 0 likes Coming back to post #20, because the follow-up matters more than the original answer. The arithmetic on documentation is the easy part and it is where the errors are,…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #81 · Lounge › Off topic · 7 Oct 2025 · 18 likes Since the Lounge tolerates a digression: the thing I find most interesting about this community is how much of the useful material is negative. Half the value is…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #81 · Practice › Side effects · 21 Sep 2025 · 14 likes The useful distinction on nausea timeline is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #62 · Practice › Side effects · 14 Sep 2025 · 0 likes The failure mode on nausea timeline is boring rather than dramatic. It is almost always the step everyone assumes was done correctly because it is too simple to get…
Analytical identity of BPC-157: a 15-mer with a simple mass Replied, post #6 · Compounds › Repair & healing peptides · 9 Sep 2025 · 1 like This follows post #5 rather than contradicting it. Oral versus injected administration claims for BPC-157: the preclinical work studied injection. Oral claims are…
Tracking that stops updating and then resumes — the long version Replied, post #10 · Sourcing › Logistics · 31 Aug 2025 · 0 likes This follows post #7 rather than contradicting it. Import restrictions by jurisdiction: what is legal to import for personal use varies enormously by country. Some…
How the vendor documentation pages are maintained, and by whom — what changed since Replied, post #47 · Sourcing › Vendor reports · 28 Aug 2025 · 24 likes Confirming post #45 from a second method, which matters more than confirming it from a second person. The claim about vendor documentation pages upthread is stronger…
Journal club: how we handle discontinuation in obesity trials — what changed since Replied, post #4 · Evidence › Journal club · 27 Aug 2025 · 10 likes The arithmetic in post #3 is right; the assumption feeding it is the part to check. The baseline characteristics table is the single most useful page for the questions…
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #95 · Compounds › Retatrutide · 15 Aug 2025 · 26 likes Coming back to post #93, because the follow-up matters more than the original answer. Counterpoint on Triple agonism, offered without confidence: the same observation…
Freeze-thaw and why one cycle is not the same as five — a second dataset Replied, post #19 · Practice › Storage & stability · 3 Aug 2025 · 0 likes That is clearer than the version I had in my head. Thank you.
Freeze-thaw and why one cycle is not the same as five — a second dataset Replied, post #7 · Practice › Storage & stability · 15 Jul 2025 · 18 likes Before the thread moves on from Freeze-thaw — what is the sample size behind the claim? I am not being difficult; I have seen the same figure quoted from an n of four…
DXA precision and the least significant change for lean mass — what changed since Started this topic · Outcomes › Body composition · 7 Jul 2025 · 2 likes DXA precision and the least significant change for lean mass — what changed since — setting out what I have, and where I think it stops being reliable. A question about…
High-resolution MS on aggregates and what it can see Replied, post #11 · Analytics › Mass spectrometry · 24 Jun 2025 · 8 likes Practical note on high-resolution: write down what you expect before you look. The number of times I have found what I went looking for is higher than chance would allow.
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #120 · Compounds › Cagrilintide & amylin analogues · 17 Jun 2025 · 6 likes The CagriSema phase 2 paper: a fixed combination of the two components in one weekly injection. The trade-off of a fixed combination is that you cannot titrate the…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #94 · Compounds › Cagrilintide & amylin analogues · 14 Jun 2025 · 12 likes Small methodological point on CagriSema phase 2 paper: repeating a measurement is cheap and resolves most of what is being argued about here at no cost to anyone.
Follow-up: Tracking intake honestly when appetite is absent Replied, post #30 · Nutrition & Training › Protein & intake · 6 Jun 2025 · 0 likes Post #29 is the version of this I will quote in future. One addition. Nobody has said the unglamorous part of Tracking intake yet, so: most of the variation is…
Coming back to: Why quantitation is the hard part, not detection Replied, post #19 · Analytics › Home & field testing · 25 May 2025 · 24 likes Worth separating two things that post #18 runs together. The bit of quantitation that nobody enjoys is that the answer changes depending on what you are trying to…
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #82 · Devices › Cold chain · 9 Apr 2025 · 4 likes Assessing an excursion: if a package sat at room temperature for a time, visual inspection (cloudiness, discoloration, particles) can alert you to problems. Not visible…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #16 · Evidence › Journal club · 29 Mar 2025 · 33 likes Post #14 is the version of this I will quote in future. One addition. Taking STEP 4 seriously for a moment rather than deflecting: the honest position is that the…
Documenting a supplier's response to a discrepancy — does this still hold? Replied, post #8 · Sourcing › Vendor reports · 20 Mar 2025 · 18 likes That is a cleaner way of putting what I was circling around.
Validating a method you did not develop — does this still hold? Replied, post #130 · Analytics › Method validation · 18 Mar 2025 · 24 likes An independent laboratory's method being different from the supplier's is not a discrepancy. It becomes one only when the results differ by more than both methods'…
Charge states for a 4 kDa peptide, worked through Replied, post #117 · Analytics › Mass spectrometry · 15 Mar 2025 · 0 likes Taking post #114 at face value and following it one step further. Electrospray ionisation produces multiply charged ions. For a 4 kDa peptide you expect mostly 2+, 3+,…
Asking about a compound your prescriber has not heard of Started this topic · Clinical › Prescriber conversations · 15 Mar 2025 · 1 like Asking about a compound your prescriber has not heard of Writing it up because I had to work it out twice and would rather nobody else did. A question about how to…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #5 · Pharmacology › Receptor biology · 24 Feb 2025 · 0 likes Half-life extension by albumin binding through a fatty acid chain trades free fraction for duration. It is an engineering solution with a cost, and the cost is that the…
Anxiety in the first weeks: drug, situation, or both Replied, post #53 · Wellbeing › Mental health · 22 Feb 2025 · 6 likes I had written a reply contradicting post #51 and deleted it. Here is what survived. Support here is genuine and is not a substitute for care, and saying both is not a…
Canadian access and provincial variation Replied, post #40 · Regional › North America · 31 Jan 2025 · 15 likes The most useful contribution is the current published criterion with a link and an access date, rather than an account of what happened to somebody. Adding a source…
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #29 · Evidence › Journal club · 20 Jan 2025 · 27 likes The most common failure mode is spending fifty minutes on the effect size and ten on the population. Reversing that ratio would improve most sessions.
Revisiting: Semaglutide formulation: what is in the licensed product besides the peptide Replied, post #18 · Compounds › Semaglutide · 19 Dec 2024 · 0 likes On the "does it stop working" question: tolerance in the pharmacological sense is not what the withdrawal trials show. What they show is that the effect persists while…
Second pass at: Choosing a concentration on purpose rather than by accident Replied, post #43 · Practice › Reconstitution · 10 Dec 2024 · 25 likes Write the reconstitution date and the concentration on the vial. Not on a note, on the vial. Every account here of a dosing error involving the wrong concentration…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #59 · Access › Insurance & coverage · 7 Dec 2024 · 30 likes Post #58 answers the question as asked. The question underneath it is different. Taking Step therapy requirements seriously for a moment rather than deflecting: the…
Journal club: STEP 4 and what a withdrawal design can prove — one year on Replied, post #12 · Evidence › Journal club · 4 Dec 2024 · 4 likes STEP 4 is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out properly. Worth twenty minutes before…
Coming back to: When to suspect the method rather than the sample Replied, post #24 · Analytics › Method validation · 3 Dec 2024 · 18 likes Accuracy: the method measures what you intend to measure. For purity methods, this is tested by spike-and-recover experiments: add a known amount of impurity to a…
When to suspect the method rather than the sample Replied, post #45 · Analytics › Method validation · 3 Dec 2024 · 2 likes Validation is compound-specific and matrix-specific. A method validated for one peptide is a starting point for another and not a validated method for it.
Research-use-only status: what it means legally and practically — a second dataset Replied, post #29 · Compounds › Other compounds · 29 Nov 2024 · 7 likes Post #27 describes the usual case. This is about the unusual one. Distinguishing three things in the Research-use-only status discussion that keep getting used…
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #108 · Practice › Dosing & titration · 20 Nov 2024 · 12 likes Where the four-week escalation interval reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
EMA product information as a primary source — does this still hold? Replied, post #6 · marked as the solution · Regional › European Union · 14 Nov 2024 · 7 likes This follows post #3 rather than contradicting it. Date every claim. Positions in this subcategory have moved repeatedly and the archive keeps posts permanently.
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #110 · Compounds › Other compounds · 12 Nov 2024 · 6 likes Small correction to my own earlier position on Melanocortin agonists. I had the units the wrong way round, which changes the conclusion by an order of magnitude and…
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #153 · Clinical › Bloodwork · 28 Oct 2024 · 6 likes Agreed, and I will stop repeating the version of this I had been repeating.
Signs of dehydration worth acting on Replied, post #34 · Safety › Adverse events · 24 Oct 2024 · 7 likes Everything in post #32 holds. The case it does not cover is the one I have. Two sentences on signs of dehydration worth acting and then I will stop, because the rest is…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #53 · Compounds › Other compounds · 16 Oct 2024 · 0 likes Post #50 describes the usual case. This is about the unusual one. Adding what did not work for me on Melanocortin agonists, since the failures never get written up and…
Requesting a page: what makes a good request — what changed since Replied, post #11 · Documentation › Wiki requests · 9 Oct 2024 · 0 likes A request is more likely to succeed with a proposed outline attached. "Somebody should write about X" rarely moves; a structure and two sections does. I am describing…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #72 · Clinical › Prescriber conversations · 7 Oct 2024 · 0 likes Taking post #71 at face value and following it one step further. Asking about the plan if the first approach does not work is a good use of an appointment and is rarely…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #54 · Sourcing › Independent verification · 12 Sep 2024 · 29 likes Confirming post #53 from a second method, which matters more than confirming it from a second person. Where two services agree with each other and with the declared…
Where the four-week escalation interval comes from, and what it is not Replied, post #10 · Practice › Dosing & titration · 31 May 2024 · 0 likes Two sentences on four-week escalation interval and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is…
Assessing a warm arrival: the decision process — one year on Replied, post #61 · Sourcing › Logistics · 30 May 2024 · 1 like That is consistent with mine, for whatever one more account is worth.