[bulbar]

That's not wrong but often not that drastic. Reducing NEAT (non exercise activity) on reduced calories is person dependent and can be quite significant.

The body however is quite robust. For a healthy person, there's no acute risk associated to significantly reduce the calories intake for a few months. You should take care to have a balanced diet, of course.

[ActorNightly]

Depends on the person. Ive known people that have tried fasting and it wasn't working - but they literally were just coming home from work and going to sleep.