First, I wish that I had the problem that several of you have with being too thin!!! Second, the answer from (or to, sorry)netav regarding getting out the toxins is important. Weight isn't the real issue with this cleanse, it is a return to health after removing toxins. You can always put on more weight, and hopefully with healthy foods, after detoxing. The weight that you lose is not weight that you want to keep, not solid muscle mass, just filth.