Lots of Indian, Japanese and Chinese children are brought up as vegans, Ana. Vegans do not just eat vegetables. They eat fruit, grains, pulses and tofu.
In the western diet, we tend to eat mainly wheat and rice, whereas others will eat a bigger variety of grains, such as buckwheat, quinoa and corn. The eastern diet also contains more pulses, lentils and soya, in the form of tofu, and nuts and seeds.
It's only since Eastern countries have started to eat more meat that they have had more degenerative diseases.
Elegran, the human is the only mammal that feeds its offspring on other mammals milk. It's not necessary.