About Protein...

Parsley

Vegetarians and vegans are often asked where they get their protein from. For vegetarians the answer is a bit easier as they consume dairy products and eggs. In vegans case, it is a bit harder to understand that even vegetable sources contain proteins, and here is an example from Young and Raw: Everything you need to know about protein.

Evolution - Our Love Affair with Fat

When we take animals from the wild, we first see what their natural environment is, then we attempt to recreate it in order to keep them happy and healthy. Same goes with food. We have to give these animals the food they evolved to eat and the food they would choose to eat in their natural environment.

Deficiencies - Vegetarians, Vegans

"Any lifelong dietary plan that requires nutrient supplementation on a regular basis makes no sense from an evolutionary perspective. You don't have to be an evolutionary biologist to realize that wild animals don't take nutritional supplements, nor do they normally develop vitamin deficiencies when living in their native environment."
                                                                  - Loren Cordain, Ph.D.