lucas_SP_BR said:

One practical note: write down what you did and when, before you need it.

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.

If somebody has the primary source to hand I would rather cite it than paraphrase it.

lucas_SP_BR said:

One practical note: write down what you did and when, before you need it.

This answered a question I did not know how to ask.

Adding the clinical framing, because it changes how the question reads. There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

traveltech_sara said:

There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

Adding a me-too, because a thread of one person's experience is not much use. The detail I would add is minor and it is already implied above.

traveltech_sara said:

There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

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.