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TL2 · Porto

Contributes reviews on supplier material. Based in Porto.

Joined 20 August 2025 · last posted 6d · groups: regional-apac

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Alcohol: what is documented and what is folklore Replied, post #126 · Practice › Interactions · 22 Jul 2026 · 0 likes Taking post #124 at face value and following it one step further. Alcohol: no absolute contraindication but it raises gastrointestinal irritation risk and this drug…
The anatomy of a question that gets answered within an hour Replied, post #115 · Start Here › How to Ask · 17 Jul 2026 · 30 likes Coming back to post #111, because the follow-up matters more than the original answer. A photograph of a vial is rarely useful and a photograph of a document usually…
What a certificate commits its issuer to Replied, post #23 · Analytics › COA interpretation · 13 Jul 2026 · 0 likes A certificate 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 not nothing. I…
Reading order for a first week here, and what to skip until later — what changed since Replied, post #7 · Start Here › Welcome · 2 Jul 2026 · 3 likes Worth separating Reading order as a question about the compound from Reading order as a question about the documentation. They get answered by different people and only…
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #37 · Analytics › Mass spectrometry · 2 Jul 2026 · 3 likes The honest summary of what a mass result buys you: it narrows the field of what the material could be, considerably. It never closes it, and no certificate should be…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #92 · Devices › Syringes & needles · 2 Jul 2026 · 5 likes Summarising the 0.3 ml versus 0.5 ml thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and…
What would change my mind about repair peptides: a specific answer Replied, post #18 · Compounds › Repair & healing peptides · 2 Jul 2026 · 7 likes Picking up post #17: that is the part I would want checked first. The lyophilised cake is worth looking at before adding diluent. A collapsed or shrunken cake is not a…
Prescription portability between countries Replied, post #82 · Access › International · 30 Jun 2026 · 6 likes This follows post #81 rather than contradicting it. Before the thread moves on from prescription portability between countries — what is the sample size behind the…
What I would want from a home test that does not exist yet Replied, post #19 · Analytics › Home & field testing · 25 Jun 2026 · 0 likes Where a home observation and an independent result disagree, the independent one is measuring something more specific. That does not make the home observation useless —…
Hair shedding at month three: mechanism and time course — the long version Replied, post #33 · Practice › Side effects · 23 Jun 2026 · 0 likes Confirming post #32 from a second method, which matters more than confirming it from a second person. Source for the Hair shedding figure, since it was asked for. It is…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #85 · Practice › Reconstitution · 15 Jun 2026 · 10 likes I had written a reply contradicting post #83 and deleted it. Here is what survived. Reconstituting a multi-strength kit: if a kit contains 5 mg, 10 mg, 15 mg vials and…
Racemisation and why it is invisible to a mass measurement Replied, post #52 · Analytics › Impurities & related substances · 11 Jun 2026 · 19 likes Post #50 is right about the mechanism and I think understates the practical bit. The honest answer on racemisation is that it depends, and the useful part is the list…