It takes approximately three to four days before the digestive system shuts down and the feelings of hunger dissipate. Here are some juice fast blogs for you to persue to gain some insight, information and encouragement in your endeavor:
http://curezone.com/blogs/f.asp?f=600 -- Hanna
http://curezone.com/blogs/f.asp?f=573 -- Dazzle
http://curezone.com/blogs/f.asp?f=566&t=49610 -- Julie
http://curezone.com/blogs/f.asp?f=594 -- But God
http://curezone.com/blogs/f.asp?f=603 -- Golden Avocado
All the best to you,
~ Dazzle