Shaila:
Amazing the difference knowing the ‘whys’ makes! (No, that’s not a criticism – I think we all do it to a certain extent – don’t give all the details because we’re replying to something/posting something on a forum.) Yes, I can see that being in hotels might pose problems, at least when I go to Germany there’s always plenty sauerkraut around! My other diet-and-fitness guru, Leonard Morehouse, said that the best diet anyone could follow would be to eat as wide a variety of foods as they could get their mitts on, but moderation in all things. Even 40 years down the line, his advice not only still holds good, but appears to be confirmed by modern dietary thinking, at least, the thinking of folk like Michael Mosley, not the clowns who dream up faddy diets for the gullible!
And I didn’t fully answer your previous question re potato starch: yes, it is still working! Not only that, I forgot to take it last night (didn’t realise until I got up and found the still-clean glass!) and had a simply dreadful night, far and away the worst I’ve had since starting.
Re your comment on some potato starch being potato flour: my bag is marked ‘Potato Starch (Farina)’, which would suggest that it is, in fact, potato flour. However, I’ve used potato flour before for cooking, and this stuff seems to be completely different, both in texture and in how it reacts. (Now there’s a thought: I wonder how it would work as a thickening agent for rote Grütze? Must try it next time! Sorry, thinking aloud, as it were!)