From the other side of the consultation, briefly. 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.
Reporting back.
For the archive: it took about six weeks rather than the two I expected, and the difference between those two numbers was the whole of my problem.
Dr.NutriCornell said:The distinction that resolves most of these threads is between what is true on average and what is true for one person.
There is a second half to this that has not been said yet. 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.
Ask again with the specifics and you will get a better answer than this one.
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Browse GL BiochemOne concrete data point for the thread. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.
One thing that is still open after Dr.NutriCornell’s answer:
Was that from a primary source or from a summary of one?