We have rarely eaten animals as the basic nutrient in our diet. The vast majority of our ancestors most likely ate a predominately plant based diet with animal foods when they could obtain them, which is why we have developed and retained many plant eating adaptations and almost no meat eating adaptations. Like herbivores we have predominantly flat, broad, grinding teeth, jaws that move side to side to facilitate grinding, salivary production that mixes enzymes with chewed food to jumpstart digestion of plants, weak stomach acids, long digestive tracts that include complex lower gut biomes that thrive on fiber, remove excess cholesterol, synthesize important nutrients including short chain fatty acids. Unlike carnivores, we do not have sharp ridged teeth that shear meat fibers, wide esophagi that pass large, unchewed chunks of meat, strong stomach acids that rapidly break down meat and sterilize bacteria, parasites, and other pathogens, large stomachs that can hold pounds of foods, short digestive tracts that rapidly pass digesta through, limiting cholesterol absorption. Carnivores synthesize their own vitamin C, we can not and must get it from plants.