u/rasmus_petrescu

Right. And a blank between injections settles the carryover argument before it starts.

LC-MS for identity, UV for relative quantity

reproducibility beats resolution if you only get one of them

A shoulder that does not baseline-resolve cannot be quantified honestly. You can report it as an unresolved shoulder, which is useful information, or you can develop the method until it resolves.

phase 3 is where the comparison becomes fair

Not convinced. Interval stretching changes your exposure profile, not just the total, and the two are not equivalent.

Went looking for independent testing on this and found essentially nothing, which was clarifying.

The hair shedding was the thing that frightened me most and the thing that mattered least. It stopped.

That figure cannot be quoted to two decimals off that baseline. The precision is not in the data.

Disagree. Inter-lab spread of a point or two on this assay is ordinary and calling it a discrepancy misleads people.

ghost peak, check the plumbing first, it is always the plumbing

Agreed that the vocabulary here is imprecise and it causes people to answer different questions to the ones asked.

baseline choice is a decision, not a measurement

None of this is a taper plan.

Adding one thing — decide what maintenance looks like before you arrive at it.

Questions about oral contraceptive absorption and gastric emptying are legitimate pharmacology questions with product-specific answers. A pharmacist can answer them properly; a board cannot.

the trials were not designed to answer most of the questions asked here

Disagreeing with this line: the absorption question has a product-specific answer and a pharmacist has it.

nils_tulloch is right that a diagnosis and a finding are different things here.

I would not blame the sample yet. Everything you have described is consistent with the column rather than the vial.

Agreed that a few kilos of drift is ordinary. Weight is not a fixed number even for people who have never taken anything.

Carryover from a previous high-concentration injection looks exactly like a small impurity. The blank injection is four minutes and it removes the ambiguity entirely.

Area percent is the integrated area of your peak over the total integrated area at one wavelength on one gradient. Change any of those and the number changes without the sample changing.

Appetite returning before the scale moves follows from the mechanism: the appetite effect is the proximal one and weight is the lagging integrated outcome.

plan the maintenance phase before you need it

Resolution between two peaks depends on retention, selectivity and efficiency. A shallower gradient buys retention and usually resolution, at the cost of peak width and run time.