Vegie juicing is a great way to cleanse the body and helps get the nutrition into the blood stream quicker. I prefer to eat vegies as I can't stand most vegie juices (the ones I do like I am unable to have at present)
As far as following the BE diet - I am down to my normal weight and once you substitute wheat/sugar/carbs/etc with products that are supportive to the body it becomes easier and then a way of life. It probably has the most comprehensive protocol of cleaning and healing the body that I have come across in over 15 years of research. I say go for it! Good luck and good health :-)