I'm starting a Water Fast (3 weeks minimum) in a few days. I did a Water Fast three months ago with great results (lost 10 pounds in 1 week). One of my friends told me, however, that I should be careful. She did a 15-day Water Fast in the past and her period "disappeared" for a few months.
Is this normal? I mean, I would like to fast for at least 21 days, but my friend's experience is making me reconsider the whole thing.
Any advise/comments will be very much appreciated.