Cardiologist William C. Roberts, Editor in chief of The American Journal of Cardiology and medical director of the Baylor Heart and Vascular Institute at Baylor University Medical Center in Dallas the famed cattle state of Texas itself, says without hesitation that Humans aren't physiologically designed to eat meat. He states that the evidence is pretty clear. If you look at various characteristics of carnivores (meat eaters) versus herbivores (non-meat eaters), it doesn't take a genius to see where humans compare"

Intestinal Length
Additional evidence of our herbivorous nature is also found in the length of our intestines. Carnivores have short intestinal tracts and colons that allow meat to pass through it relatively quickly, before it has a chance to rot and cause illness. Humans, on the other hand, have intestinal tracts that are much longer than carnivores. Like other herbivores, longer intestines allow the body more time to break down fiber and absorb the nutrients from a plant-based diet.

It is dangerous and holds many health risks to eat meat with a long intestinal tract. The bacteria in meat have extra time to multiply during the long trip through the digestive system, and meat actually begins to rot and putrify while it makes its way through the intestines. Many studies have also shown that meat can cause colon cancer in humans.

Analysing our anatomy clearly indicates the fact that the human body is built to run on a vegetarian diet. Humans have none of the obvious anatomical characteristics that either carnivores or even natural omnivores have.

As a comparison, here is a chart that shows the typical anatomical features of carnivores, omnivores, herbivores, and humans. Notice how close the human physical characteristics match those of herbivores.

Stomach Acid Carnivores swallow their food whole, relying on their high acidic stomach juices to do most of the digestive work. The stomach acid of carnivores not only breaks down the flesh, it also kills the dangerous bacteria that would otherwise sicken or kill the meat-eater. The chart below shows how weak our stomach acid is in comparison to carnivores. Strong acids are not needed to digest pre-chewed fruits and vegetables. Compare the stomach acidity of carnivores and herbivores, it is quite clear that humans fall into the herbivore category. Although we can cook meat to kill some of the bacteria and make it easier to chew, it's clear that humans, unlike all natural carnivores, are not designed to easily digest meat.

Vitamin C
Herbivores rely on their vitamin C sources purley from their diets alone, whereas carnivores make it internally. Humans do not make their own vitamin C and rely solely on diet, just as the herbivore does.

Teeth Natural carnivores eat meat raw; humans cook meat to disguise the taste of raw flesh. Why would we have to do this if we were naturally meant to eat meat? When carnivores chew, their jaws move up and down only. This enables them to tear chunks of flesh from their prey and swallow it whole. Humans and other herbivores can move their jaws up and down AND from side to side, this movement allows the herbivore to grind up fruit and vegetables with their

back teeth. Humans have flat back molars just as other herbivores do, which allows for the grinding of fibrous plant foods. Carnivores do not have these flat molars. If humans had been meant to eat meat, they would have the sharp teeth and claws of carnivores. Instead, their jaw structure, flat molars, and lack of claws indicate that they are best suited for a plant-based diet.

Enzymes
Herbivores produce a certain amount of digestive enzymes capable of breaking down a plant based diet. However, due to the fact that most humans consume meat in their diet, additional enzymes are required for digestion. Enzymes not only play a part in digestion, but are also involved in our immune system. This also indicates a reason for the increase in cancer as our meat eating increases. (see enzymes).

Human, Carnivore, Omnivore and Herbivore Comparison Chart
	Jaw Motion
	Carnivore	Shearing; minimal side-to-side motion
	Omnivore	Shearing; minimal side-to-side motion
	Herbivore	No shear; side-to-side, front-to-back
	Human	No shear; side-to-side, front-to-back
	Teeth
	Carnivore	Short and pointed
	Omnivore	Short and pointed
	Herbivore	Broad, flattened, and square-shaped
	Human	Broad, flattened, and square-shaped
	Chewing
	Carnivore	None; swallows food whole
	Omnivore	Swallows food whole and/or simple crushing
	Herbivore	Excessive chewing necessary
	Human	Excessive chewing necessary
	Stomach Acidity
	Carnivore	Around, or less than pH of 1 with food in stomach
	Omnivore	Around, or less than pH of 1 with food in stomach
	Herbivore	pH of 4 to 5 with food in stomach
	Human	pH of 4 to 5 with food in stomach
	Length of Small Intestine
	Carnivore	3 to 6 times body length
	Omnivore	4 to 6 times body length
	Herbivore	10 to more than 12 times body length
	Human	10 to 11 times body length
	Nails
	Carnivore	Sharp claws
	Omnivore	Sharp claws
	Herbivore	Flattened nails or blunt hooves
	Human	Flattened nails

Solution
Maintaining a vegetarian diet greatly reduces your risk of cancer by ensure intestinal health and helping to boost the immune system in prevention and helping to overcoming cancer. Meat eating can also contribute to an increased population of internal parasites (see Human parasites).