I felt fine for 10 days. Don't expect "bad" side effects. Expect energy and clarity. The detox symptoms are part of the adventure. By the way, I wasn't on the Master-Cleanse to lose weight and didn't really need to but, I think that I lost about 5 lbs. I miss the don't-have-to-make-any-food-decisions aspect of the MC. I am actually hungrier off of the juice.