s.diallo

TL2 Moderator · Faro

Contributes reviews on supplier material. Based in Faro.

Joined 19 October 2024 · last posted 9d

77 posts, newest first. Showing up to 150.

Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #63 · Analytics › HPLC & UHPLC · 19 Jul 2026 · 1 like Area percent is not mass percent. It is a proportion of absorbance, weighted by each species' extinction coefficient. For closely related impurities the approximation…
Follow-up: Reading an interaction checker output critically Replied, post #53 · Practice › Interactions · 18 Jul 2026 · 0 likes Anticoagulants: no direct interaction with the compounds in this class. Weight loss and body composition changes might affect the clearance or effect of warfarin if you…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #3 · Clinical › Prescriber conversations · 16 Jul 2026 · 33 likes On the opening post — agreed on the reasoning, with one qualification. Discussing off-label dosing: if you want to dose differently than the label specifies (slower…
Osteoarthritis and mechanical versus metabolic improvement — one year on Replied, post #45 · Clinical › Comorbidities · 12 Jul 2026 · 0 likes Comorbidity control: if a comorbidity (high blood pressure, high lipids) is not adequately controlled, the decision about adding compounds in this class depends on the…
Journal club: what we got wrong in an earlier session Replied, post #67 · Evidence › Journal club · 9 Jul 2026 · 0 likes This follows post #64 rather than contradicting it. Session format: read the paper before posting. The discussion is much better when everyone has. Start with the…
Sulfonylureas: the interaction most worth taking seriously — what changed since Replied, post #5 · Practice › Interactions · 8 Jul 2026 · 0 likes This follows post #2 rather than contradicting it. Oral medications versus time: if you take an oral medication 30 minutes before semaglutide (which slows gastric…
Endotoxin and why it is a separate question from purity — what changed since Replied, post #68 · Analytics › Impurities & related substances · 6 Jul 2026 · 6 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…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #106 · Evidence › Journal club · 30 Jun 2026 · 3 likes FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney disease. Stopped early for efficacy. Component-by-component analysis is…
An 18-month record including the parts that went badly Replied, post #49 · Outcomes › Progress reports · 23 Jun 2026 · 21 likes Worth separating two things that post #45 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did…
Revisiting: The best-written scientific paper you have read Replied, post #47 · Lounge › Off topic · 23 Jun 2026 · 6 likes This follows post #44 rather than contradicting it. Adjacent and interesting: you might post something about nutrition, bioavailability from a food perspective, or the…
Prescription requirements and telehealth models — a second dataset Replied, post #65 · Sourcing › Regulatory · 14 Jun 2026 · 1 like post #64 is right about the mechanism and I think understates the practical bit. Labelling and intended use: a compound sold as "research-use-only" does not change its…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #61 · Compounds › Semaglutide · 12 Jun 2026 · 11 likes Picking up post #58: that is the part I would want checked first. Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they…
Revisiting: Can a home kit substitute for a laboratory report? A careful no Replied, post #33 · Analytics › Home & field testing · 11 Jun 2026 · 0 likes Immunoassay limitations: tests that use antibodies have cross-reactivity limitations. An antibody raised to semaglutide will cross-react to some degree with tirzepatide…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #69 · Start Here › Welcome · 5 Jun 2026 · 0 likes The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the meta questions like "do we have data on this" and…
Follow-up: A parcel that arrived warm: a decision process, not a verdict Replied, post #53 · Practice › Storage & stability · 2 Jun 2026 · 9 likes Worth separating two things that post #49 runs together. Beyond-use dating: the date after which a prepared solution should not be used. It is an estimate based on how…
Review: a draft on reconstitution arithmetic, with objections — one year on Replied, post #20 · Documentation › Doc review · 31 May 2026 · 25 likes Citation checking: if a maintained page cites a paper, the citation should match what the paper actually says. If you notice a mismatch, post it here.
Shakes versus food: a pragmatic assessment Replied, post #12 · Nutrition & Training › Protein & intake · 26 May 2026 · 6 likes Protein sources: animal sources (meat, fish, eggs, dairy) are denser and easier to hit targets with. Plant sources require higher volume. Neither is nutritionally…
Gastro-oesophageal reflux: improving or worsening? Replied, post #48 · Clinical › Comorbidities · 23 May 2026 · 26 likes Obstructive sleep apnoea: SURMOUNT-OSA used an objective endpoint, the apnoea-hypopnoea index. Reduction was substantial. Whether the benefit is weight loss or a direct…
Blinding yourself: practical methods and their limits — the long version Replied, post #2 · Research Methods › N-of-1 designs · 22 May 2026 · 0 likes the opening post is right about the mechanism and I think understates the practical bit. Washout periods: after stopping a medication, how long does it take for the…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #46 · Devices › Syringes & needles · 20 May 2026 · 2 likes post #45 answers the question as asked. The question underneath it is different. Dead volume: residual liquid in the hub and needle after withdrawal. Typical residual…
Coming back to: Time to steady state after a dose increase Replied, post #55 · Pharmacology › Pharmacokinetics · 17 May 2026 · 0 likes post #54 answers the question as asked. The question underneath it is different. Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide…
GLP-1 receptor distribution: central and peripheral — one year on Replied, post #11 · Pharmacology › Receptor biology · 18 Apr 2026 · 27 likes Amylin receptor signalling: amylin promotes satiety and slows gastric emptying through a receptor distinct from GLP-1. The hypothesis behind combination therapy is two…
Pinch or no pinch, and how needle length changes the answer — the long version Replied, post #44 · Practice › Administration · 13 Apr 2026 · 1 like 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…
Spike-and-recover accuracy for a peptide assay Replied, post #6 · Analytics › Method validation · 6 Apr 2026 · 5 likes Robustness: the method gives consistent results when minor parameters vary. Tested by deliberately varying pH, temperature, flow rate, and mobile phase composition…
Choosing which test to pay for, given a fixed budget Replied, post #42 · Sourcing › Independent verification · 27 Mar 2026 · 5 likes When results are inconclusive: if a testing service reports "insufficient to verify" on a documentation review, that is not a negative finding about the product. It…
Grapefruit: why this class is not the class that cares Replied, post #45 · Practice › Interactions · 16 Mar 2026 · 15 likes Metformin: commonly co-administered and relevant to gastrointestinal tolerability. Gastrointestinal side effects can overlap and additive. Taking them separately or…
Revisiting: Sample handling between despatch and injection Replied, post #10 · Analytics › Method validation · 6 Feb 2026 · 1 like Worth separating two things that post #6 runs together. System suitability: injections run at the start of a batch to establish that the instrument and column are…
Adsorption to container surfaces and to plastics Replied, post #14 · Pharmacology › Formulation chemistry · 2 Feb 2026 · 9 likes This follows post #11 rather than contradicting it. Fill volume and headspace: the amount of solution in a vial and the air above it affect how much the solution is…
Prescription requirements and telehealth models Replied, post #73 · Sourcing › Regulatory · 17 Dec 2025 · 15 likes post #72 is right about the mechanism and I think understates the practical bit. Research-use-only status is a legal classification, not a safety classification. It…
The decimal-point error, and the habit that catches it Replied, post #2 · Practice › Reconstitution · 13 Dec 2025 · 22 likes Choosing a concentration on purpose rather than by accident: starting with "I want to draw 0.5 mL per dose" and working backward to the required concentration is more…
Adolescents: a distinct evidence base — one year on Replied, post #40 · Clinical › Special populations · 4 Dec 2025 · 15 likes Renal impairment: the compounds are cleared renally to some degree. Dose adjustments might be needed in severe renal impairment. Consulting with a clinician familiar…
Publishing an inconvenient result: a case study — the long version Replied, post #57 · Sourcing › Independent verification · 3 Dec 2025 · 0 likes When results are inconclusive: if a testing service reports "insufficient to verify" on a documentation review, that is not a negative finding about the product. It…
How the vendor documentation pages are maintained, and by whom — what changed since Replied, post #100 · Sourcing › Vendor reports · 28 Nov 2025 · 2 likes post #99 is right about the mechanism and I think understates the practical bit. Thank you for the correction. I have edited my earlier post with a note rather than…
Persistent vomiting and the threshold for seeking help Replied, post #70 · Safety › Adverse events · 16 Nov 2025 · 6 likes Where to report: in many countries there is a pharmacovigilance system where adverse events can be reported. FDA MedWatch in the US, Yellow Card in UK, EudraVigilance…
Pen dose counters: what a click does and does not guarantee Replied, post #24 · Devices › Pens & autoinjectors · 14 Nov 2025 · 13 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…
When to stop reading forums, including this one Replied, post #44 · Wellbeing › Mental health · 2 Nov 2025 · 6 likes Motivation and expectation: starting with clear motivation and realistic expectations about what will happen and when helps with psychological adjustment.
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #16 · Compounds › Tirzepatide · 19 Oct 2025 · 0 likes Picking up post #13: that is the part I would want checked first. SURMOUNT-1 reported weight reduction of a magnitude that was the largest for a pharmacological…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #52 · Analytics › COA interpretation · 14 Oct 2025 · 2 likes Water content (residual moisture) matters: lyophilised peptide is not dry. A few percent water is normal. The difference between a TFA salt and an acetate salt can be…
A parcel that arrived warm: a decision process, not a verdict Replied, post #66 · Practice › Storage & stability · 3 Oct 2025 · 0 likes post #65 answers the question as asked. The question underneath it is different. I want to gently push back on the reply above about storage extrapolation. The advice…
Hypertension improvement and when medication needs revisiting Replied, post #72 · Clinical › Comorbidities · 20 Sep 2025 · 28 likes Interactions between comorbidities: diabetes and kidney disease together change the risk calculation for hypoglycemia and for medication clearance. They are not…
Revisiting: GLP-1 receptor distribution: central and peripheral Replied, post #38 · Pharmacology › Receptor biology · 11 Sep 2025 · 2 likes GLP-1 receptor signalling: the GLP-1 receptor is expressed on beta cells (insulin secretion), on neurons (appetite and gastric motility), and on myocardium…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #107 · Access › Insurance & coverage · 5 Sep 2025 · 0 likes Tier placement and step therapy: some formularies place a medication on a higher tier or require you to fail cheaper alternatives before approving the one you want.…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #76 · Compounds › Secretagogues & GH axis · 18 Aug 2025 · 2 likes Evidence quality in the secretagogue literature is honestly weaker than in the incretin literature. Large randomised controlled trials are rare. Most evidence is…
Coming back to: Why quantitation is the hard part, not detection Replied, post #50 · Analytics › Home & field testing · 12 Aug 2025 · 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…
When a preprint is the best available evidence and we say so Replied, post #31 · Evidence › Preprints · 7 Aug 2025 · 19 likes Worth separating two things that post #27 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…
Reporting a disappointing outcome, and why it belongs here Replied, post #23 · Outcomes › Progress reports · 5 Aug 2025 · 2 likes Medication changes: escalating dose, or adding or removing other medications, can affect the rate of weight loss. Documenting medication changes alongside weight makes…
Reading a supplier's product description as a marketing document Replied, post #49 · Compounds › Other compounds · 25 Jul 2025 · 11 likes Picking up post #46: that is the part I would want checked first. Naming conventions for research peptides cause confusion because suppliers do not follow a standard.…
Are there stupid questions here? A staff answer, at length Replied, post #12 · Start Here › Welcome · 25 Jul 2025 · 0 likes On post #8 — agreed on the reasoning, with one qualification. Nothing here requires expertise. The experienced members here got that way by posting questions, not by…
Repeatability versus intermediate precision Replied, post #112 · Analytics › Method validation · 1 Jul 2025 · 0 likes System suitability: injections run at the start of a batch to establish that the instrument and column are performing. Acceptance criteria typically include replicate…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #113 · Compounds › Tirzepatide · 18 Jun 2025 · 6 likes The GIP component: GIP receptor agonism is thought to amplify the GLP-1 effect on satiety and energy expenditure, but how much of tirzepatide's effect is that and how…
[2026 update] An appeal that failed, and what I would do differently Replied, post #80 · Access › Insurance & coverage · 12 Jun 2025 · 0 likes post #79 is right about the mechanism and I think understates the practical bit. Formulary status: the list of covered medications and the tier (how much you pay) they…
Half-life, steady state, and accumulation worked through Replied, post #41 · Pharmacology › Pharmacokinetics · 30 May 2025 · 2 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…
Revisiting: Filter needles: when they help and what they cost you Replied, post #18 · Devices › Syringes & needles · 8 May 2025 · 27 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…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ Replied, post #59 · Sourcing › Independent verification · 7 May 2025 · 19 likes Cost and turnaround: different services have different pricing and turnaround times. Janoshik's turnaround is weeks by mail; VendorInvestigate documentation review is…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #75 · Evidence › Journal club · 20 Apr 2025 · 0 likes Coming back to post #73, because the follow-up matters more than the original answer. Having read the exchange above, I think I was wrong earlier in this topic and I…
Follow-up: What other technical communities get right that we do not Replied, post #70 · Lounge › Off topic · 17 Apr 2025 · 7 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.
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #14 · Clinical › Comorbidities · 7 Apr 2025 · 27 likes post #13 answers the question as asked. The question underneath it is different. Multiple comorbidities: a person with diabetes, kidney disease, and cardiovascular…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — what changed since Replied, post #44 · Practice › Reconstitution · 5 Apr 2025 · 7 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…
Units, standards, and other things that quietly hold the world together Replied, post #12 · Lounge › Off topic · 4 Apr 2025 · 0 likes Coming back to post #10, because the follow-up matters more than the original answer. Adjacent and interesting: you might post something about nutrition,…
A page that has drifted out of date and needs a maintainer Replied, post #84 · Documentation › Wiki requests · 2 Apr 2025 · 2 likes Translation suggestions: if a maintained page should exist in another language, suggesting it here helps the maintainers prioritise multilingual work.
Counter-ion form: the field almost nobody reports — one year on Replied, post #43 · Analytics › COA interpretation · 3 Mar 2025 · 12 likes When method identifiers are missing: "reversed-phase HPLC" is less specific than "reversed-phase HPLC at 214 nm on a C18 column with a 10 to 40% acetonitrile gradient…
SNAC and the mechanism of oral peptide absorption Replied, post #17 · Compounds › Oral incretins · 27 Feb 2025 · 6 likes SNAC is the sodium N-(8-[2-hydroxybenzoyl]amino) caprylate, an absorption enhancer that transiently raises local pH in the stomach and promotes gastric mucosal…
Reporting a disappointing outcome, and why it belongs here Replied, post #4 · Outcomes › Progress reports · 10 Feb 2025 · 24 likes Picking up post #3: that is the part I would want checked first. Seasonal patterns: some people report weight loss is slower in winter than summer. Body composition and…
Canadian access and provincial variation Replied, post #69 · Regional › North America · 8 Feb 2025 · 11 likes This follows post #66 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
Research-use-only status: what it means legally and practically — a second dataset Replied, post #80 · Compounds › Other compounds · 3 Feb 2025 · 0 likes On post #76 — agreed on the reasoning, with one qualification. Research-use-only status is a legal classification, not a safety classification. It means the compound is…
Gallbladder disease risk with rapid weight loss Replied, post #64 · Clinical › Comorbidities · 29 Jan 2025 · 0 likes Hepatic steatosis and MASH: a phase 2 trial in semaglutide for steatohepatitis showed resolution was more frequent on treatment. Histological resolution is a surrogate…
Protein density versus volume when you cannot eat much Replied, post #11 · Nutrition & Training › Protein & intake · 24 Jan 2025 · 0 likes Protein sources: animal sources (meat, fish, eggs, dairy) are denser and easier to hit targets with. Plant sources require higher volume. Neither is nutritionally…
[2026 update] New subcategory: rationale and scope Replied, post #152 · Meta › Announcements · 15 Jan 2025 · 6 likes Staff announcements, policy changes, and scheduled maintenance. Read-only except for questions clarifying what was announced.
SURPASS-2 and the comparator dose question that will not go away Replied, post #95 · Compounds › Tirzepatide · 3 Jan 2025 · 10 likes This follows post #92 rather than contradicting it. Nausea profile: some people report tirzepatide as less nausea-prone than semaglutide, others report it as more. The…
Building a sensible monitoring schedule with your prescriber Replied, post #38 · Clinical › Bloodwork · 19 Dec 2024 · 4 likes Fasting state: some lab tests require fasting; others do not. Lipids on a fasting draw differ from lipids on a fed draw. Always note whether the test was fasting when…
Journal club: SURMOUNT-1, read without the press release Replied, post #25 · Evidence › Journal club · 9 Dec 2024 · 0 likes STEP 1 (N Engl J Med 2021): The pivotal obesity trial for semaglutide and the reference point for most subsequent comparison. Mean weight reduction was substantially…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #128 · Analytics › COA interpretation · 24 Nov 2024 · 26 likes On post #124 — agreed on the reasoning, with one qualification. When method identifiers are missing: "reversed-phase HPLC" is less specific than "reversed-phase HPLC at…
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #4 · Evidence › Journal club · 18 Nov 2024 · 0 likes Critical appraisal template: (1) What did the trial set out to estimate? (2) Could the design answer that question? (3) Was the population sufficiently similar to your…
Requesting a page: what makes a good request — what changed since Replied, post #136 · Documentation › Wiki requests · 13 Oct 2024 · 5 likes Translation suggestions: if a maintained page should exist in another language, suggesting it here helps the maintainers prioritise multilingual work.
Coming back to: Purity assay versus content assay: two different numbers Replied, post #49 · Analytics › COA interpretation · 12 Aug 2024 · 2 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…
The C-cell question: rodent findings and their human context — what changed since Replied, post #4 · Compounds › Semaglutide · 11 Aug 2024 · 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…
Cold packs, phase-change material, and what survives ten days Replied, post #106 · Sourcing › Logistics · 15 Jul 2024 · 30 likes I read post #104 twice before replying, because I had assumed the opposite. Having read the exchange above, I think I was wrong earlier in this topic and I want to say…