I dunno if you have candida, there's heaps of symptoms and it can be hard to know if you have it or not. This website tells you the symptoms and information on candida: http://www.thecandidadiet.com/candidasymptoms.htm
I'd have a look at the symptoms and if you have a lot of them and think you might have candida, you could give the diet a go and see how you feel.
A few symptoms I have are bloating, skin problems, mucous in my throat and inability to focus.