A 24 hour fast for a mouse is like a 2 week fast for a human. Hard to say that this would result in the same outcome for humans. I've also read that lab mice are nothing like normal mice.
The truth in it is that mice lose a greater percent of their body mass in the first 24 hours. Also mice will die if deprived for food for ~5 days. So at 24 hours, they're much closer to death than a human.
But that's not really what we care about with IF. Most people care about the metabolic transitions prompted by fasting,[0] which are strikingly homologous across mammals. The variance that does exist is pretty well captured by the models that underlie those metabolic stages. This article is about something going on in the brain, which is harder to assess in humans for obvious reasons. But one of the big benefits of fasting that kicks in around the 24 hour mark is macro-autophagy. We know macro-autophagy is occuring in the brains of mice by 24 hours [1] and we know that macro-autophagy has a similar time course in humans and mice in the tissues we're able to sample.[2]
[0] https://usetemper.com/learn/metabolic-step-by-step/
[1] https://pubmed.ncbi.nlm.nih.gov/20534972/
[2] https://www.tandfonline.com/doi/full/10.1080/15548627.2016.1...
A seven day fast is something I'd encourage everyone who's otherwise healthy to try at least once in their life.
The only times I've got dizzy when '24h water fasting' are when I've been eating normal/high amounts of carbs in my diet around the fasts.
I've been doing a few days/week of 24h water fasts again, but on a very-low-carb diet, and can report no dizziness whatsoever.
An additional benefit (also mentioned by others) is that I don't have any insatiable hunger pangs on the water fasts (which I did when I attempted them on a normal/high carb diet).