Humans have many adaptations for meat consumption (teeth, stomach acidity more intense than most carnivores & comparable to scavengers, lengthened short intestine, shorter long intestine, small numerous fat cells, and more)

Evidence of animal butchery is prevalent in archeological examination of human evolution.

While meat-eating is universal among human cultures, your ability to consume plants will likely depend on your particular heritage. Some people will be more tolerant of fruit or starchy roots than others. The same is true for dairy.