I did a lot of research on this subject a couple years ago. There really isn't anything you can do to get "clean". It's a big old fad that if you are a juicer or take this healthy natural pill,that it will make you poop out shit from the colon that's been trapped there for years! Your liver and kidneys remove toxins from your body and colon removes all waste in one good shit. not juice or pills.
When you eat processed foods you are just putting your organs through extra work to get rid of the toxin. All you have to do is eat healthy and if you want to lose weight then lower calories while eating healthy(or start meth!). The 3 day fasting with juicing every few months or so can be healthy just give your colon a break,but that's about it.