I convinced my coworkers to do the 5 day juice cleanse last year and then one of them wanted to do it again right after the Christmas Holiday. The first one we did was just juice, and my two male coworkers did well on it, but since I have Gilbert's syndrome, I found myself getting dizzy by day 3. Still the juice tasted delicious. This time we did a 3 day fast and opted for the one with protein. It was perfect. I never felt hungry and the 3 of us lost weight. I would highly recommend starting with the protein one and then working your way to the other juice fast.