If you are going to use a colon cleanser, there are various important elements.  But the most important thing I find are superfoods.  Superfoods are great sources of several things, and they provide benefits that a colon cleanser cannot provide on its own, not to mention helping you to actually avoid some level of side effects.  Superfoods provide you with vitamins and minerals.  So often, you actually suffer side effects not because of the cleanse itself, but because toxins attach themselves to vital nutrients, and so they flush them out along with various other things lying in your body.  So you essentially lose everything.  When you use a good cleanse, it will replace these vitamins and minerals so that you don’t get sick. 

In addition, sometimes toxins are a bit stubborn, and frankly there are things that can hide in the nooks and crannies and basically sabotage you in other ways.  Antioxidants also kill off free radicals while actively clearing out certain problem areas that a cleanse on its own may not get.  Depending on the superfood, they also have other benefits.  But all in all, it will help you to see the results you are looking for in general.