Great question! I guess I should have done a blog about that sooner. Well here's what I know through my friend Jeff Moser.  About 4 times a year, I do a detox with the Detox-Kit from Heel.  I got it through him, but I would think it's available at health stores.  Plus there are many others out there. 

This one has three tinctures.  You put 10 drops of each in juice 3 times a day. No food to give your body a rest.  Lots of water, juice, tea etc.  If you really need to eat something fruit is fine because it's easy to digest.  I usually don't even need fruit, maybe a little the first day, but you get used to not eating.   

I make sure to do it on days that I'll be very busy - keep your mind off of eating or else you will obsess about it! (lol) I never had any adverse effects from it.  After that 3rd day, I usually feel incredibly lean.  I know several people who lose a decent amount of weight when they do it.  I usually drop about 3-4 lbs.  Then you want to start your very clean diet to keep those pounds off.  It's a good way to kick off your new diet. 

I also have a buddy, Jack Carter who is my other fitness Guru.  He told me to take MSM every day to keep my body clean.  Both of these guys are in incredible shape and really know what they are talking about - so I listen when they tell me something!  

There are other ways to detox - this is just the one that I do.