I personally believe that our species would not be here if we hadn’t been able to eat the variety of foods that we do—including dairy products and animal meat. Our ancestors who traveled from sunny Africa to Europe would have died out without vitamin D supplementation from diary, and they evolved to digest it. Vitamin B12 is only naturally present in animal products and we require it to live. But an argument for the consumption of animals is another loaded article, and clearly there are many factors other than nutrition affecting the choice to not eat meat.
~ Kath Younger (July 28, 2009)