d.tamm

TL2 · Aalborg

Contributes reviews on supplier material. Based in Aalborg.

Joined 11 January 2025 · last posted 6d

74 posts, newest first. Showing up to 150.

Submitting a sample: the process end to end Replied, post #102 · Sourcing › Independent verification · 22 Jul 2026 · 0 likes Reframing submitting a sample slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen", yes. If it…
Common supplements people ask about, assessed one at a time Replied, post #31 · Practice › Interactions · 10 Jul 2026 · 6 likes The arithmetic in post #30 is right; the assumption feeding it is the part to check. Anything that also slows gut motility compounds the same mechanism. That is a…
[2026 update] Antibiotics and a course of something with delayed emptying Replied, post #5 · Practice › Interactions · 2 Jul 2026 · 8 likes Post #2 is the version of this I will quote in future. One addition. Adding a reference point for Antibiotics. Mine is a single case, collected without controls, and I…
Revisiting: Can a home kit substitute for a laboratory report? A careful no Replied, post #41 · Analytics › Home & field testing · 27 Jun 2026 · 0 likes Noted, and thank you for writing it out rather than summarising it.
I joined for one answer and stayed for a year — what changed my mind Replied, post #27 · Start Here › Welcome · 17 Jun 2026 · 3 likes Following this. I have the same question and no better information than the first post.
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #2 · Practice › Dosing & titration · 17 Jun 2026 · 10 likes Stepping down deliberately: the withdrawal trials show that stopping is followed by regain. The step-down literature is thinner. The conservative assumption is that…
Pinch or no pinch, and how needle length changes the answer — the long version Replied, post #74 · Practice › Administration · 14 Jun 2026 · 12 likes Confirming post #73 from a second method, which matters more than confirming it from a second person. Needle length matters less than angle for subcutaneous delivery in…
Oral versus injectable exposure: comparing apples to a different fruit — a second dataset Replied, post #25 · Compounds › Oral incretins · 11 Jun 2026 · 8 likes Research-use-only oral material is not a licensed tablet and there is no reason to assume it carries a functioning absorption-enhancement system at all. The formulation…
Second pass at: Programming during a large energy deficit Replied, post #10 · Nutrition & Training › Resistance training · 1 Jun 2026 · 19 likes Post #7 and I disagree about the size of the effect, not about the direction. Frequency: three sessions per week of full-body training is easier to maintain than higher…
Follow-up: Prior authorisation: what the criteria usually require Replied, post #3 · marked as the solution · Access › Insurance & coverage · 1 Jun 2026 · 10 likes A definition problem is doing most of the work in this Prior authorisation discussion. Once the term is pinned down I suspect the disagreement mostly goes away and what…
Semaglutide and alcohol: what is actually documented Replied, post #6 · Compounds › Semaglutide · 28 May 2026 · 0 likes I had written a reply contradicting post #2 and deleted it. Here is what survived. Research-use-only semaglutide is not a licensed medicine, is not manufactured to…
Journal club: LEADER as the historical anchor Replied, post #80 · Evidence › Journal club · 27 May 2026 · 4 likes Reporting rather than recommending, on LEADER. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
Programming during a large energy deficit Replied, post #4 · Nutrition & Training › Resistance training · 24 May 2026 · 15 likes Post #2 is right about the mechanism and I think understates the practical bit. Machine-based work is often better tolerated when energy is low and is not inferior for…
CJC-1295 with and without DAC: what the modification does Replied, post #60 · Compounds › Secretagogues & GH axis · 18 May 2026 · 1 like Injection-site reactions are reported more often in this family than for the incretins. Whether that is the compounds or the preparations they are typically supplied in…
MS/MS sequence confirmation: what it costs and when it is worth it — what changed since Replied, post #25 · Analytics › Mass spectrometry · 8 May 2026 · 1 like I came in to disagree and I am leaving without a disagreement.
Converting between mg/mL and units per dose, both directions — the long version Replied, post #32 · Practice › Reconstitution · 19 Apr 2026 · 0 likes Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a peptide go into solution any faster than patience does.
Price changes over 2025 and 2026, tabulated and dated — does this still hold? Replied, post #139 · Access › Pricing · 7 Apr 2026 · 0 likes I had written a reply contradicting post #136 and deleted it. Here is what survived. Practical experience of Price changes, offered as one case with the conditions…
Research-use-only status: what it means legally and practically Replied, post #23 · Compounds › Other compounds · 4 Apr 2026 · 28 likes Reading back through the research-use-only status threads from last year, the same three questions come up every time and only one of them has ever been answered…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #103 · Research Methods › N-of-1 designs · 25 Mar 2026 · 3 likes Where I have landed on ABAB design, having got it wrong once in public: the direction is clear, the magnitude is not, and anyone quoting a precise magnitude has…
Pre-registering a personal experiment, seriously — a second dataset Replied, post #47 · Research Methods › N-of-1 designs · 25 Mar 2026 · 7 likes Measure the same thing the same way at the same time of day. Most of the noise in personal data is measurement protocol rather than biology.
Oral semaglutide bioavailability and its variability between people Replied, post #41 · Compounds › Oral incretins · 12 Mar 2026 · 14 likes Thank you for the correction. I would rather find out here than later.
The lowest dose that does anything: is that a real question? Replied, post #77 · Practice › Dosing & titration · 6 Mar 2026 · 6 likes Answering the question post #73 raises rather than the one it answers. Nothing here is medical advice, and a titration question is one of the few where a prescriber can…
Contributing data without breaching anyone's privacy Replied, post #48 · Data & Tools › Datasets · 5 Mar 2026 · 24 likes How to contribute: if you have longitudinal data you want to add, the format is simple: date, measurement, context. Contact the maintainer of the specific dataset.
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #16 · Sourcing › Vendor reports · 29 Jan 2026 · 1 like Picking up post #14: that is the part I would want checked first. Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is…
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #122 · Clinical › Special populations · 27 Jan 2026 · 3 likes Marking my uncertainty on Pregnancy and pregnancy planning explicitly. I am confident about the direction, much less confident about the size, and not confident at all…
How to read a forest plot, properly, from scratch Replied, post #74 · Evidence › Trials · 22 Dec 2025 · 0 likes A treatment-policy estimand asks what happens to people assigned to a strategy, including those who abandon it. A hypothetical estimand asks what would have happened…
Documentation that appears only after payment Replied, post #112 · Sourcing › Red flags · 20 Dec 2025 · 4 likes I would put moderate confidence on the mainstream reading of documentation and no more. That is not scepticism for its own sake; it is where the sourcing actually stops.
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #87 · Compounds › Tirzepatide · 12 Dec 2025 · 4 likes Agreed on Tirzepatide in type 2 diabetes, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption and…
Where impurities in solid-phase peptide synthesis come from Replied, post #25 · Analytics › Impurities & related substances · 7 Dec 2025 · 25 likes Impurities in solid-phase peptide synthesis is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong…
Interpreting a result that disagrees with the supplier's certificate Replied, post #24 · Sourcing › Independent verification · 26 Nov 2025 · 4 likes Fine by me. I had wanted a stronger conclusion and there is not one available.
[2026 update] How much of the diluent volume the powder itself displaces Replied, post #48 · Practice › Reconstitution · 24 Nov 2025 · 1 like Narrowing post #46, because the general version has more than one answer. A vial that will not fully dissolve: check in order: is the diluent genuinely room temperature…
A widely repeated interaction claim that turns out to be unsupported Replied, post #5 · Practice › Interactions · 14 Nov 2025 · 6 likes Anything that also slows gut motility compounds the same mechanism. That is a plausibility argument rather than a documented interaction, and it should be labelled as…
Guidelines revision: what changed and why — one year on Replied, post #33 · Meta › Announcements · 7 Nov 2025 · 7 likes Post #29 and I disagree about the size of the effect, not about the direction. I would call the community position on Guidelines revision likely rather than…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #101 · Lounge › Off topic · 16 Oct 2025 · 24 likes A digression that keeps occurring to me: the most-linked documents here are the dullest ones. Nothing gets cited like the unit-arithmetic page.
How to ask about something you suspect is a bad idea Replied, post #9 · Start Here › How to Ask · 16 Sep 2025 · 23 likes Post #7 and I disagree about the size of the effect, not about the direction. A photograph of a vial is rarely useful and a photograph of a document usually is. Redact…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #21 · Data & Tools › Datasets · 15 Sep 2025 · 2 likes Picking up post #20: that is the part I would want checked first. How to contribute: if you have longitudinal data you want to add, the format is simple: date,…
When a preprint is the best available evidence and we say so Replied, post #152 · Evidence › Preprints · 7 Sep 2025 · 1 like Where a preprint's numbers are the basis of a claim being repeated here, someone should check whether the published version exists yet. That check is nearly always…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #22 · Analytics › COA interpretation · 19 Aug 2025 · 15 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
Reading a rodent study on a secretagogue without over-extrapolating Replied, post #35 · Compounds › Secretagogues & GH axis · 13 Aug 2025 · 11 likes A purity figure without a method for a short peptide is nearly uninterpretable, because short peptides can be run on gradients that resolve almost nothing and still…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #160 · Compounds › Tirzepatide · 9 Aug 2025 · 12 likes Post #159 answers the question as asked. The question underneath it is different. On purity: the trailing-edge features people report on tirzepatide chromatograms are…
Why fasting instructions for oral semaglutide are not optional advice — does this still… Replied, post #77 · Compounds › Oral incretins · 6 Aug 2025 · 29 likes Where I part company with post #73, and it is a narrow parting. The absorption enhancer in the licensed oral product works by transiently raising local gastric pH and…
A field-by-field walk through a certificate of analysis Replied, post #117 · Analytics › COA interpretation · 17 Jul 2025 · 17 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #32 · Practice › Reconstitution · 15 Jul 2025 · 29 likes What I want from this Over-dilution 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.
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #77 · Practice › Reconstitution · 27 Jun 2025 · 0 likes Post #75 answers the question as asked. The question underneath it is different. Answering the 10 mg vial reconstituted three question as asked, then the question I…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #61 · Evidence › Journal club · 21 Jun 2025 · 0 likes The figures usually contain the finding and the text usually contains the interpretation. Separating them for the first twenty minutes is a discipline worth keeping. I…
Coming back to: Getting a referral rather than a refusal Replied, post #69 · Clinical › Prescriber conversations · 14 Jun 2025 · 0 likes A question phrased as "what would you want to see before considering X" is answerable and is not a request for X.
A ten-fold dose error caught before injection Replied, post #48 · Devices › Syringes & needles · 12 Jun 2025 · 30 likes Post #46 is right about the mechanism and I think understates the practical bit. U-100 means the barrel is graduated for a solution containing one hundred units of…
Insulin combinations and hypoglycaemia risk Replied, post #2 · Practice › Interactions · 7 Jun 2025 · 0 likes Helpful, and short, which on this subject is harder than long.
Follow-up: Tracking intake honestly when appetite is absent Replied, post #4 · Nutrition & Training › Protein & intake · 1 Jun 2025 · 9 likes The opening post is right about the mechanism and I think understates the practical bit. Tracking intake is a good example of a question where the honest answer is…
Coming back to: What published stability data actually covers, and what it does not Replied, post #52 · Practice › Storage & stability · 30 May 2025 · 6 likes I have three months of notes on published stability data actually covers and the honest summary is that the trend is real and the week-to-week numbers are noise. I…
A well-designed study with a badly written abstract Replied, post #96 · Evidence › Study critique · 21 May 2025 · 19 likes This follows post #93 rather than contradicting it. A criticism that would apply equally to every trial in the field is worth stating once and is not a reason to…
Metformin co-administration and additive GI effects Replied, post #26 · Practice › Interactions · 1 May 2025 · 3 likes Whatever the answer on metformin co-administration turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #38 · Evidence › Journal club · 18 Apr 2025 · 0 likes Reading order that works for these sessions: registry entry, methods, baseline table, primary result, then abstract last. Reading the abstract first anchors everything…
Units, standards, and other things that quietly hold the world together Replied, post #22 · Lounge › Off topic · 18 Apr 2025 · 18 likes Careful with the language on units. "Not detected" and "not present" are different findings and the first is a statement about the method.
The CagriSema phase 2 paper and what a fixed combination buys Replied, post #24 · Compounds › Cagrilintide & amylin analogues · 28 Mar 2025 · 18 likes The monoisotopic mass sits near 3749.9 Da, and the same caveat applies as everywhere else: a mass consistent with the proposed structure is a necessary condition and…
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #30 · Compounds › Retatrutide · 27 Mar 2025 · 9 likes The question underneath Triple agonism is usually "how would I tell?" rather than "what is true?", and that one has a method attached to it. Write down what you would…
Coming back to: What published stability data actually covers, and what it does not Replied, post #3 · Practice › Storage & stability · 8 Mar 2025 · 2 likes Clarity is a weak test. A solution can lose a significant fraction of its active content to degradation or adsorption while remaining perfectly clear. Not the answer,…
When "no data" is the complete and final answer Replied, post #99 · Compounds › Other compounds · 22 Feb 2025 · 16 likes Nicotinamide adenine dinucleotide preparations are not peptides at all and the certificate conventions are completely different. Reading one as though it were a peptide…
Coming back to: An 18-month record including the parts that went badly Replied, post #11 · Outcomes › Progress reports · 26 Jan 2025 · 0 likes I had written a reply contradicting post #9 and deleted it. Here is what survived. Photographs at fixed intervals under fixed conditions are a better record of…
Escalating every six weeks instead of four: what I observed over eight months Replied, post #26 · Practice › Dosing & titration · 19 Jan 2025 · 3 likes The arithmetic in post #25 is right; the assumption feeding it is the part to check. An update on my earlier escalating every six weeks instead post: the pattern held…
Recovery when intake is low: what to cut first Replied, post #22 · Nutrition & Training › Resistance training · 10 Jan 2025 · 24 likes That is a cleaner way of putting what I was circling around.
[2026 update] EU-wide position versus national implementation Replied, post #3 · Regional › European Union · 7 Jan 2025 · 1 like The centralised authorisation covers the union and national access decisions do not. That distinction accounts for most of the apparent contradictions in this…
Anxiety in the first weeks: drug, situation, or both Replied, post #28 · Wellbeing › Mental health · 18 Dec 2024 · 2 likes The social side of this — how other people respond to visible change — comes up constantly and has nothing to do with pharmacology.
Fixed versus detachable needles: the trade-offs Replied, post #50 · Devices › Syringes & needles · 14 Dec 2024 · 24 likes Everything in post #46 holds. The case it does not cover is the one I have. Adding what did not work for me on fixed versus detachable needles, since the failures never…
Reading a preclinical wound-healing model and its relevance to a human tendon Replied, post #115 · Compounds › Repair & healing peptides · 22 Nov 2024 · 21 likes BPC-157's published evidence is overwhelmingly preclinical and mostly rodent. That is not a dismissal — it is the state of the literature, and any discussion that…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #14 · Compounds › Cagrilintide & amylin analogues · 24 Oct 2024 · 4 likes Answering the question post #10 raises rather than the one it answers. The phase 3 combination programme is where the clinically interesting numbers will come from.…
What a stability-indicating method is and how you demonstrate one — one year on Replied, post #50 · Analytics › Method validation · 12 Oct 2024 · 22 likes Specificity: the method can distinguish the intended compound from related impurities and degradation products. Tested by comparing results on pure compounds, mixtures…
Follow-up: Trifluoroacetate content and its consequences Replied, post #4 · marked as the solution · Analytics › Impurities & related substances · 11 Oct 2024 · 33 likes The opening post and I disagree about the size of the effect, not about the direction. Trifluoroacetate is a counter-ion rather than an impurity, and it appears in the…
Follow-up: Dead volume across syringe and needle combinations Replied, post #43 · Devices › Syringes & needles · 2 Oct 2024 · 4 likes Answering the question post #41 raises rather than the one it answers. Insulin syringe graduations: U-100 syringes are marked in units where 100 units = 1 mL. Always…
Hepatic effects of glucagon receptor agonism: the mechanistic worry Replied, post #26 · Compounds › Retatrutide · 9 Sep 2024 · 13 likes What I would tell a new member reading about hepatic effects of glucagon receptor for the first time: the confident posts are not the reliable ones, and the reliable…
Circumference measurements as a poor man's composition estimate Replied, post #97 · Outcomes › Body composition · 25 Aug 2024 · 17 likes I keep a log for circumference measurements specifically because my memory of it turned out to be systematically wrong in one direction. Six weeks of notes cost nothing…
Coming back to: Purity assay versus content assay: two different numbers Replied, post #2 · Analytics › COA interpretation · 6 Aug 2024 · 0 likes Thank you for taking the time. That was more work than a reply usually is.
Second pass at: Retatrutide dose escalation in the published trials Replied, post #55 · Compounds › Retatrutide · 20 Jul 2024 · 0 likes Post #52 is right about the mechanism and I think understates the practical bit. Two claims get bundled together under Retatrutide dose escalation and they need…
Assessing a warm arrival: the decision process — one year on Replied, post #16 · Sourcing › Logistics · 28 May 2024 · 5 likes Documentation after arrival: photograph the parcel and its contents on arrival. If something later turns out wrong (damage, loss, wrong item) you have evidence of the…