I try to sometimes,
I practice sun-gazing which is proselytized in my thread here, (don’t do it 
)
and so I can go through a day without really having hunger, if I drink a lot of tea, some honey, tons of water, coffee, and not be tired really,
this creates a rather quick contrast of higher energy vibrations where life starts becoming a dream, and its been unpleasant and disorienting so I usually eat food.
When I was away from my home I didn’t eat for 2 days and only had water and it was fine.
When I go back to school I will engage in then, fasting + the use of sauna to clean my head out some, its pretty nice in the right way.