Any vegans here?

There is a young woman at work that is Vegan, her choice is ideology. My son in law tried it, but didn’t last long. I think he was ideology also. Diet is not to be taken lightly. We are not the same and your body will tell you what it can handle or not. Especially if you stop listening to the so called experts. A book, “eat right for your type” suggests different diets depending on your blood type. Another book, “the omnivores dilemma” rates and researched different meals from McDonalds to grocery store, to big organic, to real organic, to hunter gatherer. From least nutritious and taste to the best nutritious and taste. I personally am on the God diet. I don’t believe in evolution, or ingesting man made concoctions to mimic real food. That includes genetically modified seed. The funny thing is when I read “eat right for your type” I had already figured out what works for me, and it lined up perfectly with my blood type “O”. The cave man diet, meat and certain fruits and vegetables. Almost no grains. I also watch portions, but it is a lot easier when the food you eat satisfies you.
A lot of people don't know that their blood type determines, to large extend, what you should and shouldn't eat!!