Dr.MetabolicMD 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.

Coming at Dr.MetabolicMD’s question from a different direction. The distinction that resolves most of these threads is between what is true on average and what is true for one person. Both are real; they answer different questions and get quoted as if they were the same one.

One concrete data point for the thread. If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way. Most of the apparent contradictions in these threads dissolve at that step.

A narrower follow-up, since the general answer is now clear:

What did you change at the same time, and can you separate the two now?

labquiet_amy said:

If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way.

Careful with the causal language. Two things moving together in a period when five things changed is not a mechanism, and stating it as one makes the thread less useful to somebody reading it later.

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

labquiet_amy said:

If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way.

Correct as far as it goes. The part it does not cover is what to do when the honest answer is "not enough data", which is more often than anyone likes.