I'm a vegetarian rather than a vegan - I do have some dairy products. It isn't a paritcularly easy choice if you eat out a lot, but I'm comfortable with it. For those of you who are curious about becoming a true vegan or just having some occasional vegan meals, KQED recently aired a show on the subject with chefs Chloe Coscarelli adn Colleen Patrick-Goudreau. I caught it during a recent exercise session and the link has an mp3 of the show. I wouldn't consider them medical experts, but they do know how to make delicious food that isn't as difficult to prepare as you may think. Chole is something of a sensation in the vegan world, having won some competitions against "regular" chefs in categories where her food ruled over non-vegan dishes.
a tip from the show .. one of the best vegan restaurants in the country is in NYC and is Korean - HanGawi. I haven't been, but will.