Surely there’s documentation you can point us to, since quite a few people have been fasting for a month at a time for ages?
But I’m only looking for documented examples, not extrapolated theory (which is what your first response seems to be), as — already in this thread - we have examples of 60 and 380 day cases with no observable I’ll effects (and I’ll add my own, multiple 15-25 days over the years, starting about 25 years ago — with doctor verified no I’ll effects a month later in most of them)