Our liver and kidneys are used for detoxification. These are our "built-in" detoxification systems - very important ones, at that! The lymphatic system detoxifies, however, it's not uncommon for these systems to be overburdened due to all of the toxins found in the daily world. If these health systems are compromised, they could use a bit of help with the detoxification process. This is why regular detox can be very helpful.