Sarah: re: “Can what we are really be bad for us?” Think of it this way: Our bodies are also made up of a lot of water. Yet we know that drinking too much water can kill us. Or think of this: mammal herbivore bodies (say cows and gorillas) are made up of the same basic stuff as human bodies. And yes, eating animals is bad for those animals. Biology is a lot more complicated than your question implies. Your earlier arguments are equally flawed. If you are interested in the science, there is plenty of it to be found here on NutritionFacts. I would invite you to spend some time enjoying the informative and entertaining videos on this site.