j.ivaturi

TL2 Moderator · Uppsala

Contributes reviews on supplier material. Based in Uppsala.

Joined 30 April 2025 · last posted 2d

89 posts, newest first. Showing up to 150.

Tracking a shortage from primary sources rather than rumour Replied, post #125 · Access › Shortages · 26 Jul 2026 · 1 like Allocation and rationing: during severe shortages, suppliers might ration allocation to prescribers. Understanding rationing policies from your prescriber matters for…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #54 · Practice › Administration · 24 Jul 2026 · 3 likes Drawing up with one needle and injecting with another: a reasonable practice if you have extra needles. Fresh needle for injection reduces tissue drag and can decrease…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #80 · Analytics › Home & field testing · 24 Jul 2026 · 6 likes On post #76 — agreed on the reasoning, with one qualification. Sample handling matters: if a sample is contaminated or degraded before testing, the test gives you the…
Spreadsheets: an appreciation — what changed since Replied, post #101 · Lounge › Off topic · 15 Jul 2026 · 0 likes Personal stories: if you want to talk about what led you to this compound, your journey, or how the change has affected your life, the Lounge is the place for that.
How much context is too much context in a first post? Replied, post #63 · Start Here › How to Ask · 9 Jul 2026 · 28 likes Lab result questions: state the result, the reference interval, and what else is on the same panel. A single flag on a single draw is usually uninformative without…
Here for the analytics and not much else Replied, post #12 · Lounge › Introductions · 9 Jul 2026 · 5 likes I read post #10 twice before replying, because I had assumed the opposite. What to include: your name or handle, how you found the community, what brings you here,…
Request: tag synonyms surfaced in search Replied, post #11 · Meta › Feature requests · 4 Jul 2026 · 0 likes Effort estimation: some features are trivial to implement; others are substantial work. Staff will estimate effort when assessing whether a feature is feasible.
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #5 · Evidence › Journal club · 28 Jun 2026 · 0 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…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #66 · Analytics › HPLC & UHPLC · 24 Jun 2026 · 0 likes Column chemistry and particle size: smaller particles (1.7 μm) give better resolution and higher efficiency than larger particles (3.5 μm or 5 μm), at the cost of…
Second pass at: Absence of evidence and evidence of absence Replied, post #24 · Research Methods › Statistics · 17 Jun 2026 · 0 likes Absence of evidence and evidence of absence: if a study is small and finds no effect, that is absence of evidence, not evidence of absence. A larger study might find an…
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #55 · Analytics › Method validation · 16 Jun 2026 · 9 likes On post #51 — agreed on the reasoning, with one qualification. Transfer between laboratories: a method can be transferred from one lab to another, but the receiving lab…
The anatomy of a question that gets answered within an hour Replied, post #77 · Start Here › How to Ask · 14 Jun 2026 · 18 likes This follows post #74 rather than contradicting it. Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic done three…
Official shortage notices and what they authorise Replied, post #102 · Access › Shortages · 12 Jun 2026 · 1 like Compounding during shortages: some jurisdictions allow pharmacy compounding when a marketed product is in shortage. That permission is jurisdiction-specific and…
Request: a per-category review queue Replied, post #32 · Meta › Feature requests · 12 Jun 2026 · 3 likes Coming back to post #30, because the follow-up matters more than the original answer. Feature scope: some requests are for the site itself (search, filtering,…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #12 · Sourcing › Independent verification · 11 Jun 2026 · 17 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…
Pancreatitis history and the risk calculus Replied, post #17 · Safety › Contraindications · 8 Jun 2026 · 32 likes Worth separating two things that post #13 runs together. History of pancreatitis: these compounds can rarely trigger pancreatitis. History of pancreatitis increases…
Injection volume, overload, and peak distortion Replied, post #41 · Analytics › HPLC & UHPLC · 8 Jun 2026 · 12 likes Peak purity: a diode-array detector records a spectrum at every time point. If a peak contains two co-eluting species with different spectra, the spectrum changes…
Second pass at: When your prescriber and the evidence disagree Replied, post #31 · Clinical › Prescriber conversations · 5 Jun 2026 · 8 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Second pass at: The storage lookup and where its data comes from Replied, post #26 · Data & Tools › Calculators · 4 Jun 2026 · 0 likes Dose equivalence calculator: compounds have different potencies. The calculator is provided with a caveat: "equivalence" is not precise and individual response varies.…
Peak-to-trough ratio at steady state for a weekly agent Replied, post #28 · Pharmacology › Pharmacokinetics · 1 Jun 2026 · 5 likes Coming back to post #26, because the follow-up matters more than the original answer. Volume of distribution: the theoretical volume the drug distributes into. For…
Second pass at: A pooled estimate that changed when one trial was added Replied, post #15 · Evidence › Meta-analyses · 28 May 2026 · 29 likes Sensitivity analysis: the authors re-run the meta-analysis excluding studies one at a time, or by quality, to see whether the pooled estimate changes. Robust results…
Batch numbers that do not match the vial label — what changed since Replied, post #22 · Sourcing › Red flags · 26 May 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…
Risk-of-bias tools and the judgement they conceal — does this still hold? Replied, post #9 · Evidence › Meta-analyses · 25 May 2026 · 30 likes Number needed to treat from a meta-analysis: can be computed from the pooled estimate if the baseline risk is specified. More interpretable than pooled relative effects.
Coming back to: Swirling versus inverting versus leaving it alone Replied, post #16 · Practice › Reconstitution · 24 May 2026 · 4 likes Worth separating two things that post #12 runs together. Arithmetic step by step: a 5 mg vial with 2 mL of diluent gives (5 mg) / (2 mL) = 2.5 mg/mL. On a U-100 syringe…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #63 · Evidence › Journal club · 21 May 2026 · 4 likes Coming back to post #61, because the follow-up matters more than the original answer. Practical note that does not fit anywhere else. Whatever you conclude from this…
Private prescribing in the UK: what is actually involved Replied, post #18 · Regional › UK & Ireland · 19 May 2026 · 2 likes Picking up post #15: that is the part I would want checked first. NHS access has been restricted by commissioning criteria, not by licensing. Specialist…
Pinch or no pinch, and how needle length changes the answer — what changed since Replied, post #23 · Practice › Administration · 4 May 2026 · 0 likes Pinch or no pinch: the decision depends on needle length and on your own anatomy. A longer needle (8 mm and up) reaches subcutaneous tissue easily without a pinch. A…
Follow-up: A parcel that arrived warm: a decision process, not a verdict Replied, post #8 · Practice › Storage & stability · 28 Apr 2026 · 22 likes Temperature excursions: if a vial sat at room temperature for a time, the question is whether the excursion was long enough to cause damage. Hours at room temperature…
List price versus negotiated price versus what you pay Replied, post #70 · Access › Pricing · 14 Apr 2026 · 2 likes On post #66 — agreed on the reasoning, with one qualification. Subscription services and subscriptions: some online clinics bundle compounds into subscription models…
Revisiting: Drawing up with one needle and injecting with another Replied, post #41 · Practice › Administration · 4 Apr 2026 · 4 likes I read post #39 twice before replying, because I had assumed the opposite. Drawing up with one needle and injecting with another: a reasonable practice if you have…
Research-use-only status: what it means legally and practically Replied, post #20 · Compounds › Other compounds · 28 Mar 2026 · 4 likes On post #16 — agreed on the reasoning, with one qualification. Sequence verification: for an obscure compound, a report of the amino acid sequence or a…
Preprint servers and what screening they do Replied, post #99 · Evidence › Preprints · 23 Mar 2026 · 17 likes Picking up post #96: that is the part I would want checked first. Do not build anything on a preprint that you would mind rebuilding: if the preprint later changes…
Completing a dose with a second syringe, and the dead-volume arithmetic Replied, post #16 · Practice › Administration · 17 Mar 2026 · 11 likes Bleeding at the injection site: normal and usually minimal. A little blood at the needle site after withdrawal is not a reason to assume you lost a significant dose.…
Oral versus injected administration claims for BPC-157 Replied, post #8 · Compounds › Repair & healing peptides · 11 Mar 2026 · 17 likes What would change the position on repair peptides: adequately powered, published, peer-reviewed randomised controlled human trials with pre-specified outcomes. That is…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #37 · Research Methods › N-of-1 designs · 5 Mar 2026 · 0 likes Worth separating two things that post #33 runs together. Designing a personal experiment that could actually change your mind: that is the standard for an n-of-1…
Measurement error in a self-reported exposure Replied, post #75 · Evidence › Study critique · 25 Feb 2026 · 9 likes Worth separating two things that post #71 runs together. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather…
Storing lyophilised material long term: what governs the shelf life Replied, post #75 · Practice › Storage & stability · 21 Feb 2026 · 0 likes Published stability data applies specifically to the formulation studied, under the specific conditions stated. It does not automatically transfer to something…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #40 · Analytics › Mass spectrometry · 17 Feb 2026 · 2 likes Calibration matters: a high-resolution instrument out of calibration can report mass with ppm error large enough to be uninformative. Check when the instrument was last…
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #52 · Practice › Interactions · 15 Feb 2026 · 0 likes Supplements and herbs: many have no established interaction. Some do. If you are taking something unusual, checking a reference (like a pharmacist) is more useful than…
Angle of injection and whether 90 degrees is always right Replied, post #87 · Practice › Administration · 23 Jan 2026 · 9 likes Cold solution and stinging: warming the vial in your hands for a minute before injection reduces the stinging sensation substantially. This is the simplest thing to try…
Interpreting a result that disagrees with the supplier's certificate Replied, post #87 · Sourcing › Independent verification · 19 Jan 2026 · 0 likes On post #83 — agreed on the reasoning, with one qualification. Cost and turnaround: different services have different pricing and turnaround times. Janoshik's…
A history of disordered eating: proceeding carefully Replied, post #66 · Wellbeing › Mental health · 19 Jan 2026 · 7 likes Body image and weight loss: large weight loss changes a person's relationship with their body in ways that can be psychologically complex. Some of that is positive;…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #56 · Sourcing › Vendor reports · 11 Jan 2026 · 0 likes Coming back to post #54, because the follow-up matters more than the original answer. Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if…
Non-inferiority margins: how they are chosen and how they are abused — a second dataset Replied, post #2 · Evidence › Trials · 2 Jan 2026 · 31 likes Confounding in observational data: a third variable can explain an apparent association. In a randomised trial, randomisation balances unknown confounders. In…
Vomiting: when it is expected and when it is a reason to stop Replied, post #85 · Practice › Side effects · 29 Dec 2025 · 0 likes Timeline matters: onset, duration, pattern over days or weeks, relationship to injection and to meals all provide information that "I have nausea" does not. Posting…
Citation sweep results: how many references did not say what was claimed Replied, post #19 · Meta › Wiki maintenance · 19 Dec 2025 · 0 likes Worth separating two things that post #15 runs together. Outdated external links: if a maintained page links to external sources and those links are broken or pages…
Oral semaglutide bioavailability and its variability between people Replied, post #20 · Compounds › Oral incretins · 10 Dec 2025 · 28 likes Trial adherence in an oral trial with strict administration requirements is genuinely worse than trial-published data often suggests. That is why the exposure…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #81 · Compounds › Oral incretins · 8 Dec 2025 · 4 likes The SOUL trial: cardiovascular outcomes trial for oral semaglutide in people with type 2 diabetes and cardiovascular disease or chronic kidney disease. It demonstrates…
Angle of injection and whether 90 degrees is always right Replied, post #62 · Practice › Administration · 7 Dec 2025 · 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…
The nausea timeline across the first four weeks, with a tabulated log — what changed since Replied, post #17 · Practice › Side effects · 17 Nov 2025 · 0 likes I read post #15 twice before replying, because I had assumed the opposite. Vomiting: when it is expected (first-dose reactions or early titration) and when it is a…
Revisiting: Why tirzepatide titration schedules have more steps than semaglutide's Replied, post #88 · Compounds › Tirzepatide · 17 Nov 2025 · 2 likes post #87 answers the question as asked. The question underneath it is different. SURMOUNT-1 reported weight reduction of a magnitude that was the largest for a…
Availability by country, dated, with primary sources Replied, post #59 · Access › International · 14 Nov 2025 · 7 likes Insurance and coverage: coverage decisions are national. A compound approved in one country might not be covered by insurance in another. Checking both approval and…
What pooling buys you and what it destroys Replied, post #59 · Evidence › Meta-analyses · 5 Nov 2025 · 3 likes Sensitivity analysis: the authors re-run the meta-analysis excluding studies one at a time, or by quality, to see whether the pooled estimate changes. Robust results…
Second pass at: The mass-error checker and its intended scope Replied, post #53 · Data & Tools › Calculators · 2 Nov 2025 · 18 likes On post #49 — agreed on the reasoning, with one qualification. Mass error checking: enter your observed mass and theoretical mass and check whether the difference in…
Interpreting a result that disagrees with the supplier's certificate Replied, post #3 · Sourcing › Independent verification · 1 Nov 2025 · 16 likes Janoshik Analytical: chromatographic purity and mass-spectrometric identity on submitted samples. Reports are issued with the analytical method stated and a…
Payment mechanics and the recovery options that do not exist Replied, post #76 · Sourcing › Payments · 22 Oct 2025 · 3 likes Cryptocurrency for payment: offers less fraud protection than credit cards and is final like bank transfer. Advantage: no geographic restrictions and no intermediary…
Micronutrient adequacy at low total intake — does this still hold? Replied, post #22 · Nutrition & Training › Protein & intake · 8 Oct 2025 · 1 like Coming back to post #20, because the follow-up matters more than the original answer. Meeting protein targets on suppressed appetite: this is where the practical…
Specificity, linearity, accuracy, precision, range, robustness — with real criteria — a… Replied, post #30 · Analytics › Method validation · 5 Oct 2025 · 12 likes Worth separating two things that post #26 runs together. Limits of detection and quantitation: LOD is the lowest concentration that produces a signal above background.…
Persistent vomiting and the threshold for seeking help Replied, post #30 · Safety › Adverse events · 7 Sep 2025 · 0 likes Medullary thyroid carcinoma is the reason these compounds are contraindicated in people with personal or family history of MTC or multiple endocrine neoplasia type 2.…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #122 · Wellbeing › Mental health · 30 Aug 2025 · 6 likes Substance use: if someone has a history of substance use, appetite suppression and weight loss can shift thinking about body and substance use. This is a risk factor…
NHS criteria and how they are applied in practice — the long version Replied, post #2 · Regional › UK & Ireland · 24 Aug 2025 · 24 likes Supply and shortage resilience: both UK and Ireland sourced primarily from European suppliers until recent disruptions. Domestic availability and pricing changed.
Temperature loggers worth the money Replied, post #17 · Devices › Cold chain · 10 Aug 2025 · 27 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.
Reading a supplier's product description as a marketing document Replied, post #52 · Compounds › Other compounds · 2 Aug 2025 · 0 likes Distinguishing marketed research compounds from true chemical synthesis: some online suppliers sell compounds that are genuinely novel and difficult to obtain…
What a 2 ppm match establishes, and what it does not Replied, post #34 · Analytics › Mass spectrometry · 17 Jul 2025 · 7 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…
[2026 update] Citation sweep results: how many references did not say what was claimed Replied, post #44 · Meta › Wiki maintenance · 17 Jul 2025 · 6 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #35 · Data & Tools › Calculators · 26 Jun 2025 · 6 likes post #34 is right about the mechanism and I think understates the practical bit. Why calculators are not medical advice: they do arithmetic. Medical decisions are not…
Repeatability versus intermediate precision Replied, post #17 · Analytics › Method validation · 19 Jun 2025 · 11 likes post #16 is right about the mechanism and I think understates the practical bit. Why two laboratories may disagree: after validating the same method, they may still…
Second pass at: How to research a compound with no human data without deceiving yourself Replied, post #66 · Compounds › Other compounds · 14 Jun 2025 · 11 likes post #65 answers the question as asked. The question underneath it is different. Distinguishing marketed research compounds from true chemical synthesis: some online…
Pre-registering a personal experiment, seriously Replied, post #60 · Research Methods › N-of-1 designs · 31 May 2025 · 23 likes Objective versus subjective measures: subjective measures (how you feel) are vulnerable to bias. Objective measures (weight, strength on a specific exercise) are less…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #88 · Compounds › Tirzepatide · 19 May 2025 · 0 likes Picking up post #85: that is the part I would want checked first. The 2.5 mg starting dose is not a therapeutic dose in the sense that weight loss is minimal at that…
Lean mass preservation: what the evidence supports Replied, post #21 · Outcomes › Body composition · 18 May 2025 · 21 likes Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
Second pass at: Designing a personal experiment that could change your mind Replied, post #2 · Research Methods › N-of-1 designs · 15 May 2025 · 0 likes Stopping rules: decide in advance when you will stop measuring (after a defined duration, after a defined number of measurements, or after a defined condition is met).…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #60 · Compounds › Secretagogues & GH axis · 11 May 2025 · 0 likes This follows post #57 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #54 · Practice › Interactions · 20 Apr 2025 · 1 like Vitamins: most vitamins have no significant interaction. Fat-soluble vitamins (A, D, E, K) might be affected by the slowing of fat absorption during weight loss, but…
When "no data" is the complete and final answer Replied, post #129 · Compounds › Other compounds · 26 Mar 2025 · 12 likes AOD-9604 is a fragment of human growth hormone and has been discussed as a potential weight-loss agent based on theoretical mechanism. The fragment hypothesis — that…
Charge states for a 4 kDa peptide, worked through Replied, post #132 · Analytics › Mass spectrometry · 17 Mar 2025 · 0 likes Coming back to post #130, because the follow-up matters more than the original answer. Resolution: "high resolution" commonly means
Charge states for a 4 kDa peptide, worked through Replied, post #92 · Analytics › Mass spectrometry · 13 Mar 2025 · 1 like I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #74 · Pharmacology › Receptor biology · 10 Mar 2025 · 0 likes Picking up post #71: that is the part I would want checked first. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the…
Talking to a therapist about this specifically — does this still hold? Replied, post #26 · Wellbeing › Mental health · 7 Mar 2025 · 24 likes Picking up post #23: that is the part I would want checked first. Sleep and mental health: these compounds can affect sleep for some people. Sleep deprivation worsens…
Follow-up: What other technical communities get right that we do not Replied, post #30 · Lounge › Off topic · 3 Mar 2025 · 33 likes Politics and public policy: healthcare policy that affects access to these compounds is relevant here. Partisan politics is not.
Revisiting: Semaglutide formulation: what is in the licensed product besides the peptide Replied, post #32 · Compounds › Semaglutide · 23 Dec 2024 · 0 likes The SELECT trial changed the positioning because it was the first cardiovascular outcome trial in people without diabetes. That decoupled the cardiovascular argument…
Why "any advice?" is the least effective ending for a post Replied, post #118 · Start Here › How to Ask · 7 Dec 2024 · 9 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #38 · Sourcing › Regulatory · 4 Dec 2024 · 0 likes This follows post #35 rather than contradicting it. Approval versus licensing: a compound can be approved for a specific indication in one country and not approved at…
[2026 update] Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #44 · Evidence › Journal club · 27 Nov 2024 · 10 likes post #43 is right about the mechanism and I think understates the practical bit. FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic…
UK access routes, dated and sourced — a second dataset Replied, post #8 · Regional › UK & Ireland · 18 Nov 2024 · 18 likes Private prescribing is legal and widespread, including through remote consultation. Pharmacies must satisfy themselves that a prescription is clinically appropriate.…
US compounding rules and how they changed Replied, post #35 · Regional › North America · 22 Oct 2024 · 0 likes Private insurance gaps: some people have private insurance but medication is not covered. Manufacturer assistance programmes are the main resource for cost reduction.
Guidelines revision: what changed and why Replied, post #80 · Meta › Announcements · 27 Jul 2024 · 14 likes RSS: if you prefer to receive announcements by feed rather than visiting the site, RSS is available for this subcategory.
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #99 · Practice › Dosing & titration · 9 Jul 2024 · 5 likes Holding a dose indefinitely: the trials did not study indefinite holding at a non-maximum dose. The trials escalated to a target and then held that. What happens if you…
Assessing a warm arrival: the decision process — one year on Replied, post #20 · Sourcing › Logistics · 29 May 2024 · 3 likes On post #16 — agreed on the reasoning, with one qualification. Declaring contents accurately: declaring accurately reduces intervention risk. A declaration of "peptide…