endo_fellow_rk
TL3 Endocrinology fellow · Chicago, IL, US
Endocrinology fellow. I mostly answer bloodwork-interpretation questions and try to talk people out of over-reading a single result.
Joined 31 August 2024 · last posted 10h · groups: clinicians
149Posts here
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Second pass at: Sleep apnoea improving and the equipment implications Replied, post #97 · Wellbeing › Sleep · 27 Jul 2026 · 4 likes The published data on sleep outcomes in this class is thinner than the volume of discussion, which is worth saying plainly. I would rather post the uncertainty than…
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How shortages have affected compounding permissions Replied, post #68 · Access › Shortages · 25 Jul 2026 · 0 likes That is a fair summary of where the discussion has got to.
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A structured critique template this community uses — a second dataset Replied, post #47 · Evidence › Study critique · 23 Jul 2026 · 23 likes Attrition is the failure mode most likely to invalidate a result and the least likely to be discussed. Differential attrition between arms is the specific thing to look…
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What a certificate commits its issuer to Replied, post #53 · Analytics › COA interpretation · 18 Jul 2026 · 0 likes Endotoxin testing is separate: a certificate of purity says nothing about endotoxin. A chemically pure preparation can carry a clinically significant endotoxin load. If…
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Why I now write the concentration on the vial in marker Replied, post #5 · Practice › Reconstitution · 13 Jul 2026 · 0 likes This follows post #2 rather than contradicting it. The best check on any reconstitution calculation is to do it twice by two different routes — mass per volume, then…
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Secretagogues and glucose tolerance: the mechanistic concern Replied, post #58 · Compounds › Secretagogues & GH axis · 2 Jul 2026 · 0 likes I changed my mind about secretagogues and glucose tolerance after someone here asked me for the source and I could not produce one. That is worth saying out loud…
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Angle of injection and whether 90 degrees is always right — the long version Replied, post #36 · Practice › Administration · 1 Jul 2026 · 14 likes Pinch or no pinch: the decision depends on needle length and on your own anatomy. A longer needle (8 mm and up) reaches subcutaneous tissue easily without a pinch. A…
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Micro-titration: a disputed topic, argued properly — one year on Replied, post #57 · Practice › Dosing & titration · 1 Jul 2026 · 26 likes On post #54 — agreed on the reasoning, with one qualification. Micro-titration has a well-known answer and a correct answer, and the interesting work is establishing…
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Publication patterns in the BPC-157 literature, examined Replied, post #24 · Compounds › Repair & healing peptides · 29 Jun 2026 · 0 likes I have three months of notes on publication patterns and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly drew the opposite…
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Manufacturer assistance programmes and their eligibility rules Replied, post #36 · Access › Pricing · 22 Jun 2026 · 28 likes Insurance tier placement: a compound might be covered but on a higher tier (higher copay). Moving to a lower tier usually requires prior authorization or documented…
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Specificity, linearity, accuracy, precision, range, robustness — with real criteria Replied, post #33 · Analytics › Method validation · 22 Jun 2026 · 6 likes Robustness testing deliberately varies the parameters most likely to drift — organic percentage, pH, temperature, flow — and shows the result does not. It is the part…
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Purity assay versus content assay: two different numbers Replied, post #7 · Analytics › COA interpretation · 18 Jun 2026 · 4 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…