A lot of candida people are liver and spleen-challenged. (the spleen is an essential part of the immune system.) The spleen finds raw foods quite challenging, a weak spleen cannot handle them.
Best to start off with broths and soups rather than juice, coupled with a good pancreatic enzyme to ensure you get all the nutrients. Eat a good veggie stew with plenty of warming spices (cumin, ginger, paprika, cayenne) for two weeks and you'll see how much better you feel. :)