I've got a friend who has been doing this raw vegan diet for almost 10 months. She sticks to it religiously. She is looking good and is not underweight. But she has cut out virtually every food group apart from nuts, fruit and veg. Long term this doesn't seem like a good idea.
We went out yesterday to an nt place, and for lunch she just had a peppermint tea and ate nothing, then after lunch nibbled on some seeds as we were walking around. Doesn't sound healthy right?