BethLabQueen said:One practical note: write down what you did and when, before you need it.
This is exactly what I could not find anywhere else. Printing the relevant bit and taking it with me.
Adding the clinical framing, because it changes how the question reads. The version of this that has an answer is narrower than the version being asked. Narrow it and it becomes tractable; leave it broad and the thread will produce nine confident and incompatible replies.
PharmD_Rodriguez said:The version of this that has an answer is narrower than the version being asked.
Adding a me-too, because a thread of one person's experience is not much use.
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Shop Reference StandardsPharmD_Rodriguez said:The version of this that has an answer is narrower than the version being asked.
Adding the part of the answer the thread has not reached. 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 measure again under the same conditions.
One concrete data point for the thread. For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine. Half the figures circulating in this community trace back to a secondary summary that dropped a qualifier.