physio_marchetti

TL2 Physiotherapist · Bologna, IT

Physiotherapist. Resistance training during rapid weight loss, and realistic programming for people who are not athletes.

Joined 12 January 2025 · last posted 11d · groups: clinicians

79 posts, newest first. Showing up to 150.

What to bring: records that a clinician can actually use Replied, post #5 · Clinical › Prescriber conversations · 17 Jul 2026 · 0 likes Questions about dose: asking "how will we determine whether this dose is working for me" gets at the monitoring plan. Asking "can we start lower" or "can we escalate…
[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #37 · Analytics › HPLC & UHPLC · 14 Jul 2026 · 30 likes Before anything else: what was the gradient, and at what wavelength? Area percent at different wavelengths is not the same number even on the same sample because…
Here for the analytics and not much else Replied, post #29 · Lounge › Introductions · 13 Jul 2026 · 0 likes No judgment: people come to this community from all backgrounds and with all motivations. Introductions are for getting to know each other, not for evaluation.
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #61 · Evidence › Journal club · 9 Jul 2026 · 29 likes TRIUMPH (ongoing): Retatrutide phase 3. No results yet. Nothing should be attributed to it because it has not finished. When it does, this discussion will return to it.
How much context is too much context in a first post? Replied, post #3 · Start Here › How to Ask · 4 Jul 2026 · 6 likes Context that matters: compound, how long in, current dose, relevant history. Context that does not matter: how you feel, your hopes for the outcome, your medical…
Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #32 · Compounds › Retatrutide · 2 Jul 2026 · 1 like 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…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #45 · Analytics › Home & field testing · 2 Jul 2026 · 0 likes Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear at extremes and the correlation depends on the exact conditions…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #92 · Analytics › HPLC & UHPLC · 1 Jul 2026 · 0 likes Before anything else: what was the gradient, and at what wavelength? Area percent at different wavelengths is not the same number even on the same sample because…
Does dual agonism explain the effect size, or is it dose? Replied, post #68 · Compounds › Tirzepatide · 29 Jun 2026 · 28 likes Half-life difference: tirzepatide is about 5 days versus semaglutide's week-long. Practically, that means steady state is reached slightly faster and the post-dose…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #77 · Analytics › HPLC & UHPLC · 27 Jun 2026 · 5 likes post #76 is right about the mechanism and I think understates the practical bit. Gradient slope is the single biggest driver of apparent purity differences. A shallower…
Submitting a sample: the process end to end Replied, post #33 · Sourcing › Independent verification · 23 Jun 2026 · 0 likes Cost and turnaround: different services have different pricing and turnaround times. Janoshik's turnaround is weeks by mail; VendorInvestigate documentation review is…
A site rotation scheme that is easy enough to actually follow Replied, post #93 · Practice › Administration · 20 Jun 2026 · 6 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.…
GHRH analogues versus ghrelin mimetics: different mechanisms, conflated discussion Replied, post #25 · Compounds › Secretagogues & GH axis · 17 Jun 2026 · 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…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #80 · Evidence › Journal club · 8 Jun 2026 · 5 likes Coming back to post #78, because the follow-up matters more than the original answer. TRIUMPH (ongoing): Retatrutide phase 3. No results yet. Nothing should be…
Follow-up: Tirzepatide and nausea: is the profile genuinely different or just… Replied, post #64 · Compounds › Tirzepatide · 18 May 2026 · 3 likes This follows post #61 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
When a dose reduction is the correct response to a side effect Replied, post #21 · Practice › Dosing & titration · 17 May 2026 · 0 likes This follows post #18 rather than contradicting it. Micro-titration: the concept of increments smaller than the labelled steps. It has no evidence base from trials but…
How the vendor documentation pages are maintained, and by whom Started this topic · Sourcing › Vendor reports · 14 May 2026 · 25 likes How the vendor documentation pages are maintained, and by whom I have a specific reason for asking rather than idle curiosity, and the context is below. I would like to…
Coming back to: Washout: how long is long enough, and for what purpose Replied, post #139 · Pharmacology › Pharmacokinetics · 12 May 2026 · 1 like post #138 answers the question as asked. The question underneath it is different. Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide…
Request declined, with reasoning — what changed since Replied, post #33 · Meta › Feature requests · 25 Apr 2026 · 12 likes Requests for platform and documentation features, with the reasoning that justifies them. If you think the site would be better with a feature, suggest it with enough…
Stability of BPC-157 in solution: what has been measured — one year on Replied, post #34 · Compounds › Repair & healing peptides · 8 Apr 2026 · 15 likes Stability of BPC-157 in solution: what has been measured in published work covers specific formulations under specific conditions. Extrapolating to a reconstituted…
Revisiting: Drawing up with one needle and injecting with another Replied, post #58 · Practice › Administration · 6 Apr 2026 · 0 likes I read post #56 twice before replying, because I had assumed the opposite. Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It is not…
Grapefruit: why this class is not the class that cares Replied, post #83 · Practice › Interactions · 26 Mar 2026 · 0 likes Oral medications versus time: if you take an oral medication 30 minutes before semaglutide (which slows gastric emptying), the delayed stomach emptying affects when and…
Residual solvents and scavengers: what is looked for — what changed since Replied, post #19 · Analytics › Impurities & related substances · 22 Mar 2026 · 4 likes This follows post #16 rather than contradicting it. Residual solvents: traces of solvents used in purification. These are usually tested by gas chromatography, not by…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #22 · Research Methods › N-of-1 designs · 28 Feb 2026 · 2 likes Blinding: blinding yourself (not knowing which condition you are in) removes expectation bias. This is hard to do with these compounds (the appetite suppression is hard…
Personal import allowances, compared — a second dataset Replied, post #71 · Access › International · 18 Feb 2026 · 5 likes post #70 answers the question as asked. The question underneath it is different. Regulatory position dates: a regulatory position is only current as of when it was…
Seven-day rolling means and why weekly readings mislead — one year on Replied, post #74 · Outcomes › Progress reports · 17 Feb 2026 · 25 likes Plateaus and resets: if weight loss stalls and then resumes, that is ordinary. It is not evidence that the medication stopped working. It is not evidence that it is…
Coming back to: Time to steady state after a dose increase Replied, post #2 · Pharmacology › Pharmacokinetics · 15 Feb 2026 · 26 likes Fasting requirement for oral semaglutide: food and large fluid volumes reduce absorption. The fasting window (30 minutes before and 30 minutes after) is designed to…
Trifluoroacetate content and its consequences Replied, post #108 · Analytics › Impurities & related substances · 8 Feb 2026 · 27 likes Truncation products: fragments from incomplete synthesis or from degradation. They elute quite differently from the intact peptide because they are much smaller and…
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #47 · Practice › Interactions · 6 Feb 2026 · 27 likes Picking up post #44: that is the part I would want checked first. Alcohol: no absolute contraindication but it raises gastrointestinal irritation risk and this drug…
Reading a home test result without over-claiming — what changed since Replied, post #2 · Analytics › Home & field testing · 2 Feb 2026 · 29 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…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #72 · Pharmacology › Pharmacokinetics · 31 Jan 2026 · 1 like Worth separating two things that post #68 runs together. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather…
Heterogeneity as information rather than as a nuisance Replied, post #75 · Evidence › Meta-analyses · 25 Jan 2026 · 0 likes Worth separating two things that post #71 runs together. When a meta-analysis is unhelpful: if the included studies are heterogeneous in population, intervention, or…
[2026 update] What a good consultation looks like from the other side Replied, post #11 · Clinical › Prescriber conversations · 11 Jan 2026 · 6 likes Picking up post #8: that is the part I would want checked first. How to ask for what you need: rather than "should I take this", frame it as "I understand the evidence…
Specificity, linearity, accuracy, precision, range, robustness — with real criteria — a… Replied, post #51 · Analytics › Method validation · 30 Dec 2025 · 1 like Precision and repeatability: within-run and between-run variability of the method. Acceptance criterion is typically a relative standard deviation of ≤2% for area…
Prescription requirements and telehealth models Replied, post #87 · Sourcing › Regulatory · 24 Dec 2025 · 0 likes Regulatory positions change: a compound's status today might differ from its status a year from now. Citing a regulatory position is worth doing only with a date…
Tracking that stops updating and then resumes — the long version Replied, post #49 · Sourcing › Logistics · 9 Dec 2025 · 1 like Cold packs and temperature control: inclusion of cold packs at despatch is standard. Whether they maintain temperature through transit depends on journey duration and…
Early satiety becoming a problem rather than a benefit Replied, post #14 · Practice › Side effects · 8 Dec 2025 · 7 likes Worth separating two things that post #10 runs together. Injection site reaction: local erythema, nodules, or induration at injection sites is reported by some people.…
Robustness: the parameters worth deliberately varying Replied, post #17 · Analytics › Method validation · 23 Nov 2025 · 1 like Linearity: the detector response is proportional to compound concentration across the working range. Demonstrated by running standards at multiple concentrations and…
Revisiting: Why tirzepatide titration schedules have more steps than semaglutide's Replied, post #99 · Compounds › Tirzepatide · 18 Nov 2025 · 2 likes The 2.5 mg starting dose is not a therapeutic dose in the sense that weight loss is minimal at that dose. It is a tolerance-testing dose. Confusing the purpose of a…
What pooling buys you and what it destroys Replied, post #62 · Evidence › Meta-analyses · 9 Nov 2025 · 0 likes Study quality and weighting: some meta-analyses weight all studies equally; others weight by study size or study quality. The choice affects the result and should be…
Second pass at: Programming during a large energy deficit Replied, post #30 · Nutrition & Training › Resistance training · 6 Oct 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…
Warfarin and altered intake: the monitoring argument — the long version Replied, post #22 · Practice › Interactions · 25 Sep 2025 · 2 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…
Why catalogue breadth is not evidence of anything — what changed since Replied, post #53 · Compounds › Other compounds · 24 Sep 2025 · 25 likes When "no data" is the complete and final answer: if there is no published human data on a compound, that is the state of knowledge. Hope is not a substitute and…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #34 · Practice › Side effects · 3 Sep 2025 · 1 like Fatigue: commonly reported, frequently multifactorial. It is worth asking whether other factors have changed (sleep, training volume, diet adequacy, hydration) before…
When a preprint is the best available evidence and we say so Replied, post #65 · Evidence › Preprints · 17 Aug 2025 · 6 likes This follows post #62 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add…
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #107 · Compounds › Tirzepatide · 16 Aug 2025 · 6 likes Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound is more potent and partly because the clinical programme used a…
Follow-up: Journal club: orforglipron phase 2 and the non-peptide question Replied, post #22 · Evidence › Journal club · 15 Aug 2025 · 0 likes Coming back to post #20, because the follow-up matters more than the original answer. Critical appraisal template: (1) What did the trial set out to estimate? (2) Could…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #69 · Sourcing › Regulatory · 4 Aug 2025 · 0 likes post #68 is right about the mechanism and I think understates the practical bit. Approval versus licensing: a compound can be approved for a specific indication in one…
A field-by-field walk through a certificate of analysis Replied, post #143 · Analytics › COA interpretation · 18 Jul 2025 · 20 likes Purity and content are different measurements: purity tells you what proportion of the detected material is the intended species. Content tells you how much of the…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #46 · Data & Tools › Calculators · 8 Jul 2025 · 0 likes Reporting bugs: if you notice a calculator giving wrong results, report it in this subcategory. Bugs are fixed when identified.
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #58 · Evidence › Journal club · 25 Jun 2025 · 0 likes post #57 answers the question as asked. The question underneath it is different. SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight…
TB-500 and thymosin beta-4: the fragment versus the protein Replied, post #49 · Compounds › Repair & healing peptides · 24 Jun 2025 · 22 likes I read post #47 twice before replying, because I had assumed the opposite. Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from…
Why fasting instructions for oral semaglutide are not optional advice — does this still… Replied, post #39 · Compounds › Oral incretins · 29 May 2025 · 22 likes Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not equivalent to any injectable dose in the traditional comparison…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #95 · Compounds › Tirzepatide · 27 May 2025 · 27 likes Half-life difference: tirzepatide is about 5 days versus semaglutide's week-long. Practically, that means steady state is reached slightly faster and the post-dose…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #39 · Evidence › Journal club · 14 May 2025 · 19 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…
Follow-up: Documentation that appears only after payment Replied, post #56 · Sourcing › Red flags · 8 May 2025 · 5 likes Evasion when asked: if a supplier does not clarify when asked specifically for method details, counter-ion form, or batch origin, that itself is a red flag worth…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #102 · Compounds › Semaglutide · 3 May 2025 · 0 likes Picking up post #99: that is the part I would want checked first. Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and the…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #47 · Compounds › Secretagogues & GH axis · 21 Apr 2025 · 17 likes Reading a rodent study on a secretagogue without over-extrapolating: rodent studies can show a mechanism is plausible. They cannot show magnitude of effect in humans or…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #49 · Practice › Interactions · 15 Apr 2025 · 12 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…
Validating a calculator against hand arithmetic — what changed since Replied, post #12 · Data & Tools › Calculators · 11 Apr 2025 · 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…
Adducts: sodium, potassium, and the peak you did not expect Replied, post #50 · Analytics › Mass spectrometry · 30 Mar 2025 · 14 likes Picking up post #47: that is the part I would want checked first. Mass accuracy is expressed in parts per million. It is the difference between observed and theoretical…
Second pass at: Cross-border purchase within the EU: the actual rules Replied, post #122 · Access › International · 25 Mar 2025 · 15 likes Compounding in different countries: some countries allow pharmacy compounding under defined conditions; others do not. The rules are jurisdiction-specific and change.
Counter-ion form: the field almost nobody reports — one year on Replied, post #112 · Analytics › COA interpretation · 22 Mar 2025 · 0 likes Worth separating two things that post #108 runs together. Amino acid analysis gives content: it hydrolyses the peptide and quantifies the residues. It measures the…
Maintainer handover: how it works Replied, post #59 · Meta › Wiki maintenance · 17 Mar 2025 · 1 like Evidence synthesis: if you think a page should cover recent evidence or a new development, suggesting specific content helps the maintainer prioritise updates.
Validating a method you did not develop — does this still hold? Replied, post #107 · Analytics › Method validation · 13 Mar 2025 · 30 likes Range: the concentration range over which the method has been validated. Going outside the validated range is going outside the method's demonstrated performance.
Follow-up: What other technical communities get right that we do not Replied, post #33 · Lounge › Off topic · 7 Mar 2025 · 0 likes post #32 is right about the mechanism and I think understates the practical bit. Lower-stakes conversation that does not belong in the technical categories. Still…
Consistent declarations and why they matter more than clever ones Replied, post #78 · Sourcing › Logistics · 24 Feb 2025 · 1 like Coming back to post #76, because the follow-up matters more than the original answer. Reshipment after seizure: if a parcel is seized, some suppliers will reship;…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #56 · Compounds › Cagrilintide & amylin analogues · 26 Jan 2025 · 0 likes Reading the phase 2 paper: it establishes tolerability and efficacy in a selected population on a defined dose escalation. It does not establish the lowest effective…
When to suspect the method rather than the sample Replied, post #62 · Analytics › Method validation · 7 Jan 2025 · 0 likes Robustness: the method gives consistent results when minor parameters vary. Tested by deliberately varying pH, temperature, flow rate, and mobile phase composition…
Why our vendor pages link the storefront and mark it sponsored Replied, post #19 · Sourcing › Vendor reports · 5 Jan 2025 · 6 likes Lot matching: confirm the lot number on the certificate matches the lot number on the vial. A result from a different lot is not evidence about your vial.
Identical chromatograms across two different lots Replied, post #71 · Sourcing › Red flags · 3 Jan 2025 · 0 likes This follows post #68 rather than contradicting it. Inconsistency across documents: a certificate stating one purity, a website claiming another, and a supplier's…
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #72 · Compounds › Semaglutide · 23 Dec 2024 · 10 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…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #152 · Analytics › COA interpretation · 15 Dec 2024 · 27 likes A certificate of analysis is a statement by its issuer that a defined test was performed on a defined lot and produced a defined result. That is all it is, and it is…
The topic list is dense — is that deliberate? Replied, post #65 · Meta › Site feedback · 11 Dec 2024 · 2 likes Moderation decisions: if you disagree with a moderation decision, raising it here gives it visibility. Staff will reconsider if you make a substantive case.
[2026 update] Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #55 · Evidence › Journal club · 9 Dec 2024 · 3 likes post #54 is right about the mechanism and I think understates the practical bit. PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not…
Coming back to: Reading a meta-analysis you disagree with, fairly Replied, post #4 · Evidence › Meta-analyses · 8 Dec 2024 · 5 likes Subgroup analysis: sometimes a meta-analysis reports separate pooled estimates for different subgroups (e.g., by baseline body mass index or by trial duration). Be…
Why "any advice?" is the least effective ending for a post Replied, post #105 · Start Here › How to Ask · 4 Dec 2024 · 1 like Questions you cannot explain: "I cannot say why I am asking this, but is this compound stable at room temperature?" is more productive than no question at all. People…
A revision dispute resolved on the topic rather than in the history — a second dataset Replied, post #17 · Meta › Wiki maintenance · 25 Oct 2024 · 12 likes Coming back to post #15, because the follow-up matters more than the original answer. Evidence synthesis: if you think a page should cover recent evidence or a new…
Guidelines revision: what changed and why Replied, post #41 · Meta › Announcements · 26 Jul 2024 · 20 likes Questions welcomed: if an announcement is unclear, asking for clarification is welcome. Staff will explain their reasoning.