VanRx_Mike said:The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either.
Coming at VanRx_Mike’s question from a different direction. It is worth asking what the claim would look like if it were false. If nothing would look different, it is not a claim about the world and no amount of discussion will settle it.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
One concrete data point for the thread. Worth stating the units and the reference range whenever you post a number here. A large fraction of the apparent disagreement in these threads is two people using different units and both being right.
One thing that is still open after VanRx_Mike’s answer:
How would you tell the difference between that and the alternative explanation?
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Browse GL Biochembri_stats said:Worth stating the units and the reference range whenever you post a number here.
This is where I part company with the consensus forming above. Pushing back on the anecdote-stacking. Twenty people reporting the same thing is twenty samples from the same self-selected pool, not twenty independent confirmations.
bri_stats said:Worth stating the units and the reference range whenever you post a number here.
That is right for the common case. Whether it is right for the case being asked about depends on a detail that has not been given.