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Meat consumption trends and health: casting a wider risk assessment net

Humans come from a long line of meat-eaters. For much of the past two million years our hominid forebears have been evolving from scavenging to systematic hunting. This trend was intimately coupled with the evolution of the human brain, which now is much larger and more complex than was the brain of our mostly vegetarian australopithecine ancestors. In many hunter-gatherer communities meat became a major, even the majority, source of dietary energy. The ethics and aesthetics of carnivory aside, meat is a high-grade source of nutrients. Furthermore, across many cultures and stages of economic development, meat (especially red meat) is regarded as a desirable food, and an increase in meat consumption therefore figures prominently in the ‘nutrition transition'...