Yep...that apple fast is powerful stuff! For anyone who is considering fasting and thinks that the apple fast may be easier than a liquid fast since you get to actually eat something...THINK AGAIN! I've done numerous liquid fasts...juice, Master Cleanse...but the apple fast kicked my butt like no other! I've never researched it to see if there's an explanation for this...but I suspect it's the malic acid and the pectin...really pulls the gunk out of your tissues. Just make real sure to keep your bowels moving so that you can expel the toxins as quickly as possible and...like Tracey said...drink mucho aqua!!!