Calm down there. On the protein/vitamin deficiency question, this is something I typically hear when vegetarianism is discussed (including by vegetarians themselves), so I figured there was some significance to it. I mentioned cereal, by the way, because it's not just plant matter - the manufacturers put tons of extra vitamins and shit in it, thus it could conceivably take the place of various meat/dairy foods.
From my understanding, most vegans have to plan their diet somewhat carefully to avoid vitamin deficiencies - hence the popularity of stuff like tofu, tempeh, and soymilk among vegans. I've read that vitamin B12 is particularly hard to find, and that a lot of soymilk distributors actually put extra B12 in their products.
My point is that you don't become vegan simply by going out into a pasture and chewing grass. If humans were actually herbivores, it shouldn't be as hard as it is to find an adequate plant diet.
Okay, I thought you knew more about what we're talking about but I guess not... I'll try to make this clear.
We've been hunters, gatherers (i.e. picking up plant foods to bring home) and farmers since the dawn of man.
How is finding plants to eat a difficult thing to do? It's hell of a lot easier than finding and killing animals. At least in the context of early man. Hunting was a lot of work, but they did it because one buffalo could feed half the village, it was efficient, and they
didn't waste anything.
Humans don't eat grass moron. However, that doesn't mean we aren't herbivores by nature. I've said over and over our bodies are designed like that of an herbivore, and I really didn't think it was that hard to see.
I've used this example a million times on this board but it's an easy one: look at the shape of a humans small intestine and colon, then look at a carnivores. Humans intestines are extremely long, bunched up and have tons of curves and crevices for things to get stuck in. They require lots of fiber to keep things moving so things don't get stuck. A carnivores intestines are straight and short. No bunches, no crevices for things to get stuck in. Meat passes through easily for them, unlike us. Perhaps you've heard about how the steak you ate 5 years ago there are still pieces of it in your intestines, waiting to finally be flushed out.
This is why athletes and body builders go on fasts yearly---to help their systems flush out.
I hope that was easy for you to understand. As I said i've been a vegan for 9 years so I know a lot on the subject, you can ask me anything you want. I've never had a problem with getting enough protein, iron, b12, anything. And a lot of what you're hearing about vegans missing stuff is usually in their heads because we are so scared we're not getting enough protein, etc. Sometimes I convince myself I'm iron deficient and feel so tired I go and get a blood exam and it turns out just fine! And then I feel better because I realize it was all in my head. This happens to vegans/vegetarians all the time, because we are constantly being told we must be deficient. Mind over matter is a very powerful thing.
Regarding B12: It's a bacteria that is found in soil. It's no longer found on vegetables or fruit in commercial stores because of how we wash our produce these days, and wax it, etc. Meat eaters only get it because they eat flesh that already has it stored in it. Vegans have trouble only because our vegetables are washed off of all the soil that at one point would still be somewhat on them. b12 is incredibly easy to get in either nutritional yeast, soymilks (like you said) and as a supplement. You only need the minutest amount (like 50 mgs can last you months). Not only that but our bodies store B12 (thats why you can get it through eating meat) so because we always have a store of it it's very unlikely that you would be deficient in it. Deficiencies in B12 are incredibly rare.