I have been waiting for someone to ask me that. Here is my opinion. Firstly in my case I am hypoglycemic and have fibromyalgia. My body was depleated of vitamins and nutrients because of these 2 medical conditions. Secondly and I believe this effects almost everyone....Our food is so over processed that we arent getting many nutrients from them. Also even if we take them in thru food, our bodys may have a hard time absorbing them. In PPLP there is a chapter called the "magnesium miracle" I persoanlly think it explains it well. Also makes sense from reading that, why we my be missing other vita-nutrients in our system. I do intend to cut back on all that I take BUT Im also going by how I feel. Never in my life have I felt so good....And of course I have done many many types of "diets" and this WOL is the only one that works for me.