j.restrepo
TL2 · Recife
Contributes reviews on supplier material. Based in Recife.
Joined 19 June 2025 · last posted 13d · groups: regional-apac
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Tirzepatide storage and stability: what is published versus what is assumed Replied, post #18 · Compounds › Tirzepatide · 15 Jul 2026 · 0 likes This follows post #15 rather than contradicting it. Having read the whole tirzepatide storage and stability thread before replying: the question in the first post has…
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What a certificate commits its issuer to Replied, post #18 · Analytics › COA interpretation · 12 Jul 2026 · 33 likes Worth separating two things that post #15 runs together. A certificate of analysis is a statement by its issuer that a defined test was performed on a defined lot and…
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Transit times by route, from a logged dataset Replied, post #3 · Sourcing › Logistics · 11 Jul 2026 · 22 likes Import restrictions by jurisdiction: what is legal to import for personal use varies enormously by country. Some jurisdictions are quite permissive; others are not.…
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Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #20 · Evidence › Journal club · 3 Jul 2026 · 19 likes That is clearer than the version I had in my head. Thank you.
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Reading order for a first week here, and what to skip until later — what changed since Replied, post #9 · Start Here › Welcome · 3 Jul 2026 · 1 like The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
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What would change my mind about repair peptides: a specific answer Replied, post #16 · Compounds › Repair & healing peptides · 27 Jun 2026 · 0 likes Dose-response is unstudied in humans for essentially everything in this family, which means the confident numbers in circulation came from somewhere other than a trial.…
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Coming back to: Why a preprint's supplementary material is often the best part Replied, post #85 · Evidence › Preprints · 21 Jun 2026 · 19 likes Post #84 is right about the mechanism and I think understates the practical bit. Where numbers change between preprint and published version, the changes are not…
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Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #10 · Compounds › Retatrutide · 21 Jun 2026 · 0 likes I read post #8 twice before replying, because I had assumed the opposite. A theoretical mass for retatrutide is not published in the peer-reviewed literature in a form…
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Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #31 · Analytics › Mass spectrometry · 20 Jun 2026 · 16 likes The reason 2 ppm match is hard to answer is that the obvious measurement and the relevant quantity are not the same thing, and substituting one for the other is silent.
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Injecting into an area that has become firm: why not to Replied, post #92 · Practice › Administration · 17 Jun 2026 · 0 likes On post #88 — agreed on the reasoning, with one qualification. If you have to inject at a different time of day than usual, that is a much smaller perturbation than it…
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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #5 · Analytics › Impurities & related substances · 16 Jun 2026 · 0 likes Freeze-drying itself does not generate impurities in any significant way. Handling before and after it does, which is why transit conditions belong in the discussion.
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Injecting into an area that has become firm: why not to Replied, post #77 · Practice › Administration · 15 Jun 2026 · 12 likes Bleeding at the site is common and unremarkable at these needle gauges. Persistent bruising in the same area repeatedly is worth a change of technique or of site rather…