Not much: I am guessing that you plan to fast for 2-4 days. This will of course make you hungry and will slightly change your metabolism but it will do you no harm. Many in fact as part of their spiritual rituals fast for 1-3 days and function quite well.
Answered 1/4/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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