This is basically a group of supplements to take while doing a five-day fast. If you have not tried fasting before jumping into a five-day fast, with or without supplements is not an easy feat. So, you may want to try a couple of smaller fasts first to ease you into this. Or, you can do what I did, and eat a very small dinner (basically just soup) each night. As others have said, the fiber supplement is kind of like chalk. If you mix it with juice and slam it, it is not too bad, but there are better fiber supplements out there. How well the liver and colon cleanse worked is hard to tell. I did have regular bowel movements throughout despite not eating much food so in that sense, I guess the colon cleanse worked. The one thing that was measurable is that the first night I slept like a rock for nine hours. I do not remember waking up or even moving much.
I do agree that day thee is the hardest one to get through. Once you get past that, the worst part is over. Also, I would strongly advise against working out beyond just a light stretching workout. I would not do any kind of weight lifting or intense cardio because you are probably not going to have the energy for it.