Dr.PeteFamMed said:

Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then…

Agreed, with the usual condition: that holds for the average and this board is a collection of individuals. A population claim and a personal prediction are different things and get quoted interchangeably.

KetoKyle said:

The absorption variability is real, but it partly averages out over weeks — the steady-state trough is less erratic than any single day would suggest.

Genuinely useful, thank you. I had the facts and not the framework. I will report back once I have actually tried it.

Dr.PeteFamMed said:

Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then…

Pushing back on Dr.PeteFamMed here. Filing an objection on the n=1 problem. Personal experience is genuine evidence about one person and very weak evidence about anybody else, and this thread keeps promoting the first into the second.

Adding the numbers, since they settle part of this. The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the same conditions. Nobody wants that answer and it is still the answer.

Moderator note: the sourcing question belongs in the vendor section and has been split out. Carry on.