I could never be vegan, I am such a picky eater! Besides, I don't like experimenting with diets or nutrition, because no matter how healthy they may come across, they could still cause an adverse side effect.
For example, soy milk is rather popular where I am. But I cannot have soy milk, I get a severe reaction. The last time I had it was when I was at an appointment maybe three years ago, I had a cup of coffee with soy milk in it. I was literally kneeled over in the office, crying in pain and puking my guts out.
My point is, not all 'healthy' alternatives work for everyone.
But I admire Evanna for being able to live this way.