Seems many scientists think we would be more well, if we were to give up meat.
And I quote from another source:

"Says Dr. William C. Roberts, editor of the American Journal of Cardiology, "Although we think we are, and we act as if we are, human beings are not natural carnivores. When we kill animals to eat them, they end up killing us, because their flesh, which contains cholesterol and saturated fat, was never intended for human beings, who are natural herbivores."

Read the full post by Kathy Freston here