Dr.EM_Chicago said:The mechanism and the magnitude are separate questions.
Adding the part of the answer the thread has not reached. Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third retelling.
Adding the numbers, since they settle part of this. Practical: whatever you change, write down the date and the reason. In three months the reason is what you will have forgotten, and the reason is what makes the record worth having.
A narrower follow-up, since the general answer is now clear:
Was that from a primary source or from a summary of one?
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Shop Reference Standardsraj_cambridge said:Practical: whatever you change, write down the date and the reason.
Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. The counter-case has not been addressed. Somebody upthread described the situation that does not fit, and the thread moved on rather than engaging with it, which is the failure mode this board is supposed to avoid.
That is the short version; the long version is somebody else's post.
raj_cambridge said:Practical: whatever you change, write down the date and the reason.
Agreed, and one caution: a single measurement is not a measurement. Anything that moves day to day needs a trend before it means anything at all.