i keep seeing those "diary websites" about loosing 20 lbs of fat in 3 weeks and offering free trials of these pills. but i just would like to know if these is a great way to detox your body and if their is any truth to the claims. and if so, which are the best pills to take?

My boyfriend and I were discussing the raw food diet (which he is on and I am not), he says there are so many benefits and hardly any side effects. I decided to look that up online, while I found thousands of sites saying what a wonderful diet this was, I did not find anything about side effects or people that should or should not be on it. In fact I found nothing negative at all!!! This is really hard for me to believe, so if you have been on this diet and had something negative, could you tell me your experience so I don’t feel like I’m going crazy! Nothing works 100% of the time, right?
The diet I’m talking about is only fruits, veggies, and nuts or seeds. No meat or diary and no cooking anything.