Your body can meet the majority of your calorie requirements from stored fat, but total starvation is fatal in 8-12 weeks, regardless of initial body weight.
I mean, that guy was eating vitamins and yeast, which sounds like exactly the kind of thing the previous commenter was suggesting you’d need to eat, so maybe they had a point.
That’s not how that works. You still need nutrients, fat is energy but you will die in 30 days if you don’t eat.
That is exactly how it works, https://en.m.wikipedia.org/wiki/Angus_Barbieri's_fast
I mean, that guy was eating vitamins and yeast, which sounds like exactly the kind of thing the previous commenter was suggesting you’d need to eat, so maybe they had a point.