I have a wonderful, young, energetic chiropractor. He has made big differences in my family's physical well being and I appreciate it.
However, he has a sideline that features "detox" kits, supplements, meal replacement plans, all sorts of things. We have told him before that we aren't interested. My friend and her DH were there, and she was reading the "detox" kit instructions. She remarked that it wasn't so bad that you had to do the no food part for three days, but didn't understand why you could only drink distilled water.
I hear warning bells. Distilled water in small quantities with a normal diet is not harmful, but it is hypotonic, so having that as your only source of hydration for three days is a very bad thing.