When we look at species to determine what they are, we can look at their behavior or we can analyze their biology. It is undeniable that humans can behave like an omnivorous animal, after all, they eat meat. But, are we really biologically made to eat everything?
Physiologically, the human digestive system strongly resembles that of herbivores:
Humans do not have sharp claws to capture their prey, nor speed.
We don't have sharp teeth to tear raw meat and our mouth opening is small.
Human digestion begins with the chewing process. The saliva of carnivorous animals does not contain any enzymes for digesting starch.
The stomach volume of humans, like herbivores, is about 25 percent of the gastrointestinal tract and our small intestine is very long, about 10 times the length of the body.
Human gastric juice is not able to digest the leather, hair, bones and feces that come with animal meat.
Carnivores produce their own vitamin C, while herbivores and humans obtain it from their diet.
In the heat, humans sweat like herbivores, whereas carnivores sweat mostly with their tongues out.
The digestive system of humans resembles that of chimpanzees and other great apes, which primarily eat plants, with only 2 to 3 percent of their diet made up of termites and other insects.
Unlike carnivores and omnivores who hunt their prey and salivate at the sight of blood, humans are normally repulsed at the sight of a dead and bloody animal, many people become nauseous and faint at the sight of blood.
Today, strong evidence demonstrates that many chronic diseases could have their risk reduced through a strict, integral, healthy and well-planned vegetarian diet.
