i have been a vegan for 5 plus years now. I do not eat only certain foods together to get "essential amino acids" . My doctor at my last visit 8 months ago took blood and tested me for vitamins bone density scan , the works, Turns out I am healthy but fat. hence i am on these forums. If you want to go vegan I suggest reading "Becoming Vegan" by Brenda Davis and Vesanto Melina.
You can also pm me with questions.