Interesting that you state evolved.
Actually, there is scientific evidence that suggests including red-meat in your diet may make you more susceptible to bacterial (E. coli) infection and increased incidence of cancer. This has nothing to do with antibiotics, growth hormones, fats/cholesterol and or rays of sunshine...
The cause, is believed to be an evolutionary change in the type of sugars expressed on human cells compared to other mammals including the delicious bovine. We have evolved to express a sugar called NeuAc while cattle express NeuGc. However, to make a long story short our body is capable of incorporating NeuGc on our cells which despite our inability to make this sugar is provided in large quantities following the digestion of steak.
Toxins from the bacteria can interact favorably, from the bacterias point-of-view, to the NeuGc on our cells and increase infection. Also, our own bodies can react to the NeuGc creating an inflammatory response that has been linked to tumour progression.
Having said all of this and knowing all of this I continue to eat beef, lamb, pork, deer, elk, and moose etc without any loss of sleep.
Radley
p.s. PM me if you want references
