No, you need to take in enough calories (from food) to fuel the stuff going on inside in your body (heart pumping etcetera). Also you need nutrients and vitamins to keep yourself alive.
Not on water alone – your body needs carbohydrate, proteins, fat and vitamins to survive so you can’t just live on water as there is nothing in it to make energy from
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nspireyox commented on :
THANKS GUYSSS – MARK i voted you