I can tell you as a long time vegetarian and vegan of 5 years that most of the supposed facts you hear about protein is absolute horseshit.

As humans, we need very little protein to survive, and any protein we take in needs to be broken down into its constituent amino acids before the body can utilise it. So any idiot that argues that we need meat or blood to survive is just emotionally attached to this idea and is talking out his arse!

If you think about it on a logical level, the time a human is growing at its fastest rate is as an infant. What is the food source? Well, ideally human milk. How much protein is in that milk? Only about 2.5-3.5%. Doesn't that make you think that all the hype about protein levels is way over emphasised!

see here for more:

[link to www.veganforum.com]

The number one question any veggo gets is "where do youget you protein?". I usually ask them the same question and get the response "from cow meat and milk". Ok, so where does the cow get the protein from? Hmmmmm, grass. So really you are getting second hand protein from grass. Wouldn't it be easier and more efficient to get the protein from plant sources to start with?

Think about it. How many carnivores/omnivores eat other carnivores? Where does a lion usually chomp on first...the stomach and intestines, since they can't process the plant matter themselves.

Anyway, I could go on but there are infinite sources on the web about this stuff. There are plenty of vego, vegan and even raw vegan bodybuilders out there, including pros.