Maybe we were meant to eat meat, maybe we werent, here is some food for thought on how the human body is made up in regards to eating meet.  Maybe it is right, maybe wrong
http://www.celestialhealing.net/physicalveg3.htm
Humans weren't meant to eat meat
When you look at the comparison between herbivores and humans, we compare much more closely to herbivores than meat eating animals. Humans are clearly not designed to digest and ingest meat. 
Meat-eaters: have claws 
Herbivores: no claws 
Humans: no claws
Meat-eaters: have no skin pores and perspire through the tongue 
Herbivores: perspire through skin pores 
Humans: perspire through skin pores 
 Meat-eaters: have sharp front teeth for tearing, with no flat molar teeth for grinding 
Herbivores: no sharp front teeth, but flat rear molars for grinding 
Humans: no sharp front teeth, but flat rear molars for grinding 
Meat-eaters: have intestinal tract that is only 3 times their body length so that rapidly decaying meat can pass through quickly 
Herbivores: have intestinal tract 10-12 times their body length. 
Humans: have intestinal tract 10-12 times their body length. 
Meat-eaters: have strong hydrochloric acid in stomach to digest meat 
Herbivores: have stomach acid that is 20 times weaker than that of a meat-eater 
Humans: have stomach acid that is 20 times weaker than that of a meat-eater 
Meat-eaters: salivary glands in mouth not needed to pre-digest grains and fruits. 
Herbivores: well-developed salivary glands which are necessary to pre-digest grains and fruits 
Humans: well-developed salivary glands, which are necessary to pre-digest, grains and fruits 
Meat-eaters: have acid saliva with no enzyme ptyalin to pre-digest grains 
Herbivores: have alkaline saliva with ptyalin to pre-digest grains 
Humans: have alkaline saliva with ptyalin to pre-digest grains 
Based on a chart by A.D. Andrews, Fit Food for Men, (Chicago: American Hygiene Society, 1970)
Clearly if humans were meant to eat meat we wouldn't have so many crucial ingestive/digestive similarities with animals that are herbivores.
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Meat and seafood putrefies within 4 hours after consumption and the remnants cling to the walls of the stomach and intestines for 3-4 days or longer than if a person is constipated. Furthermore, the reaction of saliva in humans is more alkaline, whereas in the case of flesh-eating or preying animals, it is clearly acidic. The alkaline saliva does not act properly on meat.
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