I have been told that the miracle noodles are okay to eat on the HCG Diet. I have looked into them and they seem they should be fine to eat. However, I don't know of anyone who has actually tried them. So if you decide to do them and you notice a decrease in weight loss, you'll know why - and you should stop using them.
But if you try them, let us all know how they work - I am very interested in knowing. Maybe you could write a guest post about them on the HCG Diet 411 Blog.