I just finished a 4-day juice fast in solidarity with my roommates. They're going on longer but it was making me lose weight too quickly!
You guys should do it -- it's effective, delicious, energizing, and won't deprive you of essential nutrients (since you're getting so many vitamins, minerals, soluble fibers, and even protein from the juice). As long as you're juicing veggies and not drinking Tropicana