i.boateng

TL2 · Plovdiv

Contributes reviews on supplier material. Based in Plovdiv.

Joined 30 July 2025 · last posted 2d · groups: newcomer-guides

87 posts, newest first. Showing up to 150.

NHS criteria and how they are applied in practice Replied, post #42 · Regional › UK & Ireland · 25 Jul 2026 · 27 likes Small correction to my own earlier position on NHS criteria. I had the units the wrong way round, which changes the conclusion by an order of magnitude and therefore…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #40 · Clinical › Prescriber conversations · 23 Jul 2026 · 0 likes Post #36 describes the usual case. This is about the unusual one. Prescription logistics: confirm whether it will be filled locally, requires mail order, or will be…
Transit times by route, from a logged dataset Replied, post #7 · Sourcing › Logistics · 13 Jul 2026 · 30 likes Second this, and I would have said it less carefully.
Revisiting: The best-written scientific paper you have read Replied, post #73 · Lounge › Off topic · 6 Jul 2026 · 7 likes Best-written scientific paper has been discussed here with more heat than it deserves, mostly because two definitions have been in play the whole time.
Revisiting: Protein density versus volume when you cannot eat much Replied, post #32 · Nutrition & Training › Protein & intake · 4 Jul 2026 · 5 likes Fibre and fluid tend to fall alongside protein when intake drops, and the constipation reported here follows from that as much as from the mechanism. If that reads as…
Programming during a large energy deficit Replied, post #29 · Nutrition & Training › Resistance training · 1 Jul 2026 · 15 likes My experience of programming during a large energy contradicts the reply above. I am posting it as a data point rather than as a refutation, because one person's…
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #35 · Analytics › Mass spectrometry · 28 Jun 2026 · 22 likes The arithmetic in post #34 is right; the assumption feeding it is the part to check. The claim about 2 ppm match upthread is stronger than its source supports. I have…
What a reversed-phase purity number actually is Replied, post #2 · Analytics › HPLC & UHPLC · 24 Jun 2026 · 3 likes Reading rather than contributing, but this is the most useful thread I have found on it.
What would change my mind about repair peptides: a specific answer Replied, post #12 · Compounds › Repair & healing peptides · 19 Jun 2026 · 0 likes Thank you for taking the time. That was more work than a reply usually is.
Racemisation and why it is invisible to a mass measurement Replied, post #109 · Analytics › Impurities & related substances · 14 Jun 2026 · 7 likes A supplier that can tell you what its principal impurity is has answered a harder question than one that can tell you its purity, and the answer is more useful.
Micronutrient adequacy at low total intake Replied, post #48 · Nutrition & Training › Protein & intake · 10 Jun 2026 · 5 likes Picking up post #45: that is the part I would want checked first. My experience of micronutrient adequacy contradicts the reply above. I am posting it as a data point…
Fasting versus non-fasting and which tests care Replied, post #45 · Clinical › Bloodwork · 9 Jun 2026 · 8 likes Following, with nothing to contribute beyond having asked the same thing elsewhere.
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #109 · Sourcing › Red flags · 7 Jun 2026 · 4 likes Building on post #107 rather than restating it. Nothing here should be read as an accusation against a named company, and the guidelines exist so that reports remain…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #44 · Analytics › Home & field testing · 7 Jun 2026 · 17 likes Adding the measurement that post #41 says would settle it. The right question for any home test is: what physical quantity does it measure, and what would have to be…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #2 · Practice › Administration · 7 May 2026 · 33 likes The opening post answers the question as asked. The question underneath it is different. A new needle for each injection is not fussiness. A needle blunts on first use…
Second pass at: The storage lookup and where its data comes from Replied, post #13 · Data & Tools › Calculators · 4 May 2026 · 0 likes Storage lookup: which conditions (temperature, time) are you considering storing in, and how much stability loss is expected? The calculator gives a rough estimate…
Request: show the solution author in the topic list — what changed since Replied, post #40 · Meta › Feature requests · 2 May 2026 · 23 likes Alternatives: if you have thought of a way the current site might already serve your need, mention it. It helps assess whether the feature is truly missing or just not…
Washout with a one-week half-life: the arithmetic — does this still hold? Replied, post #12 · Research Methods › N-of-1 designs · 2 May 2026 · 31 likes Post #10 answers the question as asked. The question underneath it is different. Objective versus subjective measures: subjective measures (how you feel) are vulnerable…
Journal club: is percentage weight change the right endpoint? Replied, post #83 · Evidence › Journal club · 19 Apr 2026 · 17 likes I read post #79 twice before replying, because I had assumed the opposite. Sessions on negative or null results are consistently the most instructive and the hardest to…
Follow-up: Search filters: what is missing Replied, post #77 · Meta › Site feedback · 14 Apr 2026 · 0 likes Post #73 and I disagree about the size of the effect, not about the direction. Filing a mild objection to the consensus on Search filters. Mild because I might be…
List price versus negotiated price versus what you pay Replied, post #54 · Access › Pricing · 12 Apr 2026 · 14 likes Taking post #51 at face value and following it one step further. I read the earlier replies on list price versus negotiated price twice before writing this, because I…
Bug report: the reconstitution calculator and a rounding edge case Replied, post #72 · Data & Tools › Calculators · 11 Apr 2026 · 1 like Post #68 put the caveat in the right place and I want to underline it. Significant figures in the output should not exceed what the inputs support. A concentration…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #8 · Practice › Reconstitution · 6 Apr 2026 · 26 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. I have…
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Replied, post #83 · Practice › Storage & stability · 5 Apr 2026 · 0 likes This follows post #82 rather than contradicting it. Checked the Adsorptive losses claim against the primary source this morning. It survives, with a narrower scope than…
Forced degradation studies: designing one that is informative Replied, post #22 · Analytics › Method validation · 19 Mar 2026 · 13 likes On post #20 — agreed on the reasoning, with one qualification. Specificity is the first question: does the method separate the analyte from everything reasonably…
Reconstitution volumes that produce round numbers, tabulated Replied, post #65 · Practice › Reconstitution · 13 Mar 2026 · 0 likes Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It is not a licence to treat an entered vial as sterile…
Type 2 diabetes and the largest part of the evidence base Replied, post #27 · Clinical › Comorbidities · 11 Mar 2026 · 0 likes Gastrointestinal conditions interact with a mechanism that slows gastric emptying in ways that are plausible and largely unstudied.
Cold solution and stinging: the simplest fix Replied, post #6 · Practice › Administration · 7 Mar 2026 · 0 likes The failure mode on cold solution and stinging is boring rather than dramatic. It is almost always the step everyone assumes was done correctly because it is too simple…
Moderation log format change Replied, post #34 · Meta › Announcements · 7 Mar 2026 · 0 likes Picking up post #31: that is the part I would want checked first. Summarising the moderation log format change thread so far, since it is long and the answer is buried:…
How to ask about something you suspect is a bad idea Replied, post #60 · Start Here › How to Ask · 1 Mar 2026 · 6 likes Where I part company with post #58, and it is a narrow parting. If you are asking about a document, quote the exact wording of the line you are asking about.…
Why oral semaglutide needs an absorption enhancer at all — one year on Replied, post #8 · Compounds › Oral incretins · 25 Feb 2026 · 18 likes Dose equivalence between oral and injectable formulations is not a simple conversion and no published factor should be used as one. The two were developed and titrated…
Citation sweep results: how many references did not say what was claimed Replied, post #41 · Meta › Wiki maintenance · 5 Feb 2026 · 0 likes Careful with that. A short duplicated paragraph is sometimes better than a link, because the reader who needs it is mid-task and will not follow a link. The test is…
Where impurities in solid-phase peptide synthesis come from Replied, post #39 · Analytics › Impurities & related substances · 2 Feb 2026 · 11 likes Building on post #36 rather than restating it. Reporting thresholds matter: below a stated threshold, peaks are usually not reported at all. A clean-looking table may…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #107 · Compounds › Semaglutide · 31 Jan 2026 · 11 likes Solutions of semaglutide can look faintly opalescent without anything being wrong. Visible particulate, fibres or frank cloudiness are a different observation entirely…
Temperature loggers worth the money — the long version Replied, post #122 · Devices › Cold chain · 28 Jan 2026 · 0 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…
Trifluoroacetate content and its consequences Replied, post #26 · Analytics › Impurities & related substances · 26 Jan 2026 · 9 likes Confirming post #23 from a second method, which matters more than confirming it from a second person. I disagree with the framing of trifluoroacetate content above, and…
Whether an aggregate is worth publishing at all: a disputed topic — does this still hold? Replied, post #4 · Data & Tools › Datasets · 20 Jan 2026 · 6 likes Appreciated. The plain phrasing does more work here than a longer post would.
Coming back to: Private prescribing in the UK: what is actually involved Replied, post #10 · Regional › UK & Ireland · 24 Dec 2025 · 0 likes That is a fair summary of where the discussion has got to.
Availability by country, dated, with primary sources Replied, post #81 · Access › International · 29 Nov 2025 · 11 likes A first-hand dated account for a region with thin coverage is worth more here than any summary, and the regions with thin coverage are most of them. Somebody will have…
DXA precision and the least significant change for lean mass Replied, post #14 · Outcomes › Body composition · 22 Nov 2025 · 0 likes Adding the measurement that post #12 says would settle it. Lean mass loss during rapid weight reduction: depends on protein intake, resistance training volume, and…
Lurking for two months before posting: was that the right call? Replied, post #26 · Start Here › Welcome · 18 Nov 2025 · 0 likes You do not need to introduce yourself before asking a question, and nobody will think worse of you for arriving with one. The introductions subcategory exists for…
Prescription requirements and telehealth models Replied, post #14 · Sourcing › Regulatory · 14 Nov 2025 · 4 likes Coming back to post #12, because the follow-up matters more than the original answer. If you can confirm or contradict a position for your own region, please date the…
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #6 · Practice › Interactions · 9 Nov 2025 · 1 like Alcohol is not contraindicated in the labelling and it does irritate a stomach that is already emptying slowly. There is no published interaction study, and the…
A 40-week log with the measurement method stated Replied, post #89 · Outcomes › Progress reports · 28 Oct 2025 · 0 likes Seasonal patterns: some people report weight loss is slower in winter than summer. Body composition and activity changes might contribute. Noting the season is useful…
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #115 · Compounds › Tirzepatide · 24 Oct 2025 · 0 likes Post #112 is the version of this I will quote in future. One addition. Heart rate rises modestly across this class, tirzepatide included. It is consistent, small, and…
Titles that describe the question, not the situation Replied, post #125 · Start Here › How to Ask · 18 Oct 2025 · 3 likes Do not apologise in the first line. It costs you the space where the question should be, and nobody here thinks a question is an imposition. Noting that I have skin in…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #127 · Practice › Side effects · 7 Oct 2025 · 9 likes A request rather than an answer: could whoever has the primary source for nausea timeline post it? I have seen the claim three times this month and each version had…
Micronutrient adequacy at low total intake — does this still hold? Replied, post #8 · Nutrition & Training › Protein & intake · 5 Oct 2025 · 0 likes On post #7 — agreed on the reasoning, with one qualification. What would change my mind on Micronutrient adequacy is a second dataset collected by someone with no stake…
Persistent vomiting and the threshold for seeking help Replied, post #43 · Safety › Adverse events · 1 Oct 2025 · 9 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.…
Power cut for eleven hours: how I assessed it afterwards Replied, post #72 · Practice › Storage & stability · 26 Sep 2025 · 0 likes Power cut for eleven hours is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
Coming back to: Why quantitation is the hard part, not detection Replied, post #68 · Analytics › Home & field testing · 21 Sep 2025 · 21 likes The question underneath quantitation 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…
What a purity-only report leaves out Replied, post #8 · Sourcing › Independent verification · 7 Sep 2025 · 0 likes It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than what was measured. The variance between people…
Are there stupid questions here? A staff answer, at length Replied, post #136 · Start Here › Welcome · 31 Aug 2025 · 0 likes Nothing here requires expertise. The experienced members here got that way by posting questions, not by knowing the answer before they showed up. If you know something…
Airline travel with a temperature-sensitive injectable — what changed since Replied, post #68 · Devices › Cold chain · 26 Aug 2025 · 1 like Lyophilised material is far more tolerant of a warm transit than a solution would be, which is why suppliers ship dry and why an excursion is not automatically a loss.
Revisiting: GLP-1 receptor distribution: central and peripheral Replied, post #20 · Pharmacology › Receptor biology · 26 Jul 2025 · 1 like I read post #18 twice before replying, because I had assumed the opposite. Amylin receptor signalling: amylin promotes satiety and slows gastric emptying through a…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #101 · Practice › Reconstitution · 16 Jul 2025 · 11 likes Reconstituting the whole vial when you will use a quarter of it is a decision to store the rest in solution, which is the least stable state it will ever be in.…
Asking about a compound your prescriber has not heard of Replied, post #83 · Clinical › Prescriber conversations · 3 Jul 2025 · 5 likes A second opinion is a normal part of medicine rather than an accusation, and asking how to obtain one is a legitimate question.
Follow-up: Tracking intake honestly when appetite is absent Replied, post #69 · Nutrition & Training › Protein & intake · 12 Jun 2025 · 20 likes Protein supplements: whey, casein, and plant-based protein powders can help hit targets when whole-food intake is limited by appetite. Protein quality (all essential…
[2026 update] An appeal that failed, and what I would do differently Replied, post #2 · Access › Insurance & coverage · 5 Jun 2025 · 18 likes Appeal deadlines are strict and are stated in the letter. Missing one is the most avoidable way to lose.
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — what changed since Replied, post #69 · Practice › Reconstitution · 13 May 2025 · 9 likes Two people can reconstitute the same vial to different concentrations and both be right. The dose is the same; only the volume drawn differs. This confuses more…
Reading a trial's population section before its results — does this still hold? Replied, post #86 · Evidence › Trials · 10 May 2025 · 0 likes Nothing in a trial report is medical advice about an individual, and the gap between a population estimate and a person is exactly where clinical judgement lives. The…
Follow-up: Requesting a page: what makes a good request Replied, post #29 · Documentation › Wiki requests · 2 May 2025 · 0 likes If a request is declined, the reasoning is written down, and it is worth reading because it usually describes a better version of the same idea.
Certificates issued by the seller versus by a laboratory Replied, post #29 · Analytics › COA interpretation · 3 Apr 2025 · 24 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #69 · Sourcing › Red flags · 22 Mar 2025 · 32 likes This follows post #67 rather than contradicting it. The strongest single signal available cheaply is what happens when you ask a technical question. A quantitative…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #30 · Pharmacology › Receptor biology · 2 Mar 2025 · 0 likes Thank you — that answers what I came here to find out.
Distinguishing a deletion sequence by mass alone Replied, post #61 · Analytics › Mass spectrometry · 7 Feb 2025 · 1 like Mass error in parts per million is (observed minus theoretical) divided by theoretical, times a million. On a high-resolution instrument a low single-digit figure is…
Adjudicated events and why the definition matters — the long version Replied, post #3 · Evidence › Trials · 6 Feb 2025 · 20 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…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #4 · Compounds › Secretagogues & GH axis · 29 Jan 2025 · 0 likes On analysis: these are short peptides and generally straightforward chromatographically, which means a poor purity result is more likely to reflect the synthesis than…
Follow-up: Dead volume across syringe and needle combinations Replied, post #89 · Devices › Syringes & needles · 27 Dec 2024 · 0 likes On post #86 — agreed on the reasoning, with one qualification. Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G) are courser. For…
Injection-site reactions: describing them precisely enough to be useful Replied, post #52 · Practice › Side effects · 6 Dec 2024 · 23 likes Post #48 and I disagree about the size of the effect, not about the direction. The practical version of injection-site reactions is three sentences long. The rigorous…
Converting between mg/mL and units per dose, both directions Replied, post #116 · Practice › Reconstitution · 4 Dec 2024 · 0 likes Fair, and the limits you put on it are the part I will remember.
Athletes in weight-category sports: a different risk calculus — a second dataset Replied, post #33 · Clinical › Special populations · 1 Dec 2024 · 23 likes Second-hand on Athletes in weight-category sports, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.
Tracking semaglutide's approved indications across jurisdictions, dated — does this… Replied, post #50 · Compounds › Semaglutide · 29 Nov 2024 · 25 likes The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it…
How to ask for a dose change without antagonising anyone — what changed since Replied, post #89 · Clinical › Prescriber conversations · 22 Nov 2024 · 24 likes Post #88 is right about the mechanism and I think understates the practical bit. Bringing a record of symptoms with dates and severities makes an assessment materially…
Telehealth prescribing models in the US Replied, post #24 · Regional › North America · 19 Nov 2024 · 0 likes The arithmetic in post #21 is right; the assumption feeding it is the part to check. Anyone reporting an outcome should give the stated reason rather than the verdict.…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #46 · Compounds › Semaglutide · 18 Nov 2024 · 0 likes I read post #42 twice before replying, because I had assumed the opposite. The STEP programme populations were selected: enrollment criteria required baseline body mass…
Converting between mg/mL and units per dose, both directions Replied, post #55 · Practice › Reconstitution · 18 Oct 2024 · 25 likes On post #54 — agreed on the reasoning, with one qualification. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a…
Progressive overload when the scale is falling — one year on Replied, post #153 · Nutrition & Training › Resistance training · 12 Oct 2024 · 0 likes Where I part company with post #149, and it is a narrow parting. Worth stating the null on Progressive overload before we explain it: the observation may be nothing.…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #91 · Access › Shortages · 12 Oct 2024 · 20 likes Where an alternative within the class is available, the comparison is a clinical one and the doses are not equivalent.
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #81 · Analytics › COA interpretation · 11 Oct 2024 · 21 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
Coming back to: Renal impairment: what the labelling says about dose Replied, post #8 · Clinical › Special populations · 10 Oct 2024 · 12 likes Where the Renal impairment discussion usually stalls is that nobody wants to say "I do not know" and everyone is willing to say "it varies". Those are the same sentence…
A rising related-substance total over six months: degradation or method drift? Replied, post #31 · Analytics › Impurities & related substances · 3 Sep 2024 · 0 likes Aggregates may be a multiple of the monomer mass and may not elute at all under a standard method. What does not come off the column does not appear in the area…
Taste changes and food aversion, reported and discussed Replied, post #14 · Practice › Side effects · 29 Aug 2024 · 0 likes This follows post #13 rather than contradicting it. Taste changes and food aversion is one of those subjects where the general answer and the answer for a specific case…
Correlation in a self-tracked dataset: what it can support Replied, post #15 · Research Methods › Statistics · 20 Aug 2024 · 0 likes Correlation between two derived quantities that share a component is partly artefactual. It is a common trap in analyses of ratios.
Gallbladder disease risk with rapid weight loss Started this topic · Clinical › Comorbidities · 10 Aug 2024 · 23 likes Posting this under the heading it deserves: Gallbladder disease risk with rapid weight loss Everything below is what sits behind that. Gallbladder disease risk — I have…
Patterns that reliably precede a problem, documented Started this topic · Sourcing › Red flags · 27 Jul 2024 · 10 likes Patterns that reliably precede a problem, documented — setting out what I have, and where I think it stops being reliable. Patterns, from the point of view of someone…
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #3 · Practice › Dosing & titration · 6 Jul 2024 · 24 likes Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.