small win: chromatogram stopped being a problem at week 35
Long-ish post, sorry. tl;dr at the bottom.
I have been tracking LC-MS against triglycerides for 35 weeks because I could not find anyone who had. The correlation is weaker than I expected, which is itself mildly interesting given how confidently people link the two in here.
Caveats up front: one person, one lab, one assay, no control, and I changed my training in the middle of it, which was stupid.
tl;dr: probably real, definitely smaller than the threads imply, and not worth reorganising your week around.
best — the order this archive was captured in
Removed a chain here. The rule is one line long and it is not negotiable.
Rodent data is rodent data. Dose scaling is not linear and the models tell you what to investigate, not what to expect.
This is the correct method framing. Column and gradient are load-bearing fields.
Half-life is about 168 hours, so steady state lands around week 5–5. Practical consequence: what you feel in week 1 is not what that dose does.
Not to be pedantic but LC-MS and purity are being used interchangeably and they are not interchangeable in real life.
integration decision on a shoulder changes your number by half a point on its own
a round-robin on baseline integration would be genuinely useful
related substances are where the story lives, not the main peak
co-elution is real and LC-MS is usually not enough to resolve it
state the method: column, gradient, detection wavelength, injection volume
the gradient is doing the separation work, not the column alone
You have restated the marketing copy. What is the actual substance here.
Rodent data is rodent data. Dose scaling is not linear and the models tell you what to investigate, not what to expect.
Not to be pedantic but HPLC and purity are being used interchangeably and they are not interchangeable in real life.
This is the correct method framing. Column and gradient are load-bearing fields.
axis labels included, always
state the method: column, gradient, detection wavelength, injection volume
The evidence standard in c/vendorvetting gets called too strict about once a month, and every time, the thread ends with the complainant agreeing.
You have restated the marketing copy. What is the actual substance here.
Mechanistically the bit that matters is chromatogram. It explains most of the early profile and a decent chunk of the outcome.
Mechanistically the bit that matters is chromatogram.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
You have restated the marketing copy.
Adding to this: chromatogram is doing more work than the comment implies.
Titration speed is a side-effect dial far more than an efficacy dial.
the detector wavelength matters more than people think
two labs, two different baselines, two different purity numbers, both honest
co-elution is real and purity is usually not enough to resolve it
Did they post the raw trace or just the summary?
- 1This is the correct method framing. Column and gradient are load-bearing…7 comments in this branch · started by u/marit_mensa
- 2You have restated the marketing copy. What is the actual substance here.6 comments in this branch · started by u/micro_bump_mick