Hi North Star
I personally feel that a cleansing reaction is the body doing what it would have done if it had the building blocks to do so along the way to becoming toxic. Think about it. When you get a cold or a fever, this is the body producing mucous or heat to either drive out toxins and invaders, or burn out the invaders. When you finally get enough oxygen into your system to allow the body to do what it was deprived of doing naturally, the process of elimination of toxins and/or parasites is accelerated. It all becomes a question of how comfortable you are with the process, how fast you want to cleanse and how uncomfortable you want to be before you see the light at the end of the tunnel.