kate.chem said:

Helpful anti-nausea foods for hydration users: Ginger (tea, chews, supplements — all work) Peppermint (tea or oil capsules) Plain crackers or rice…

I read this differently from kate.chem, on substance rather than tone. 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.

Adding the numbers, since they settle part of this. One practical note: write down what you did and when, before you need it. Reconstructing a timeline from memory three months later is how people end up unable to answer the one question that would have resolved it.

Dr.SleepRoch said:

Twenty people reporting the same thing is twenty samples from the same self-selected pool, not twenty independent confirmations.

Adding the part of the answer the thread has not reached. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.

Following on from denise_HTX — and this may be the naive question:

What would you measure differently if you were starting again?

Closing the loop on my own question.

Reporting back with a partial result, because a partial result is still better than silence. Two of the three things suggested helped; I cannot separate them and I am not going to pretend otherwise.