Thirdly, that the surmise having humans adapted to specific local diets is unproven
Thirdly, that the surmise having humans adapted to specific local diets is unproven. Further, that humans are capable of greater nutritional flexibility than the diet gives them credit for and finally, that the Paleolithic period was an extremely lengthy period which saw human existence in different geographies offering different foods. In addition it is argued that Paleolithic man did not suffer from diseases of affluence; diabetes, etc. because he hardly ever lived long enough to develop them. More convincing however is the argument that the underlying cause of such diseases is excess food energy in contrast to energy used, rather than the uptake of specific foods.
This makes sense especially if one considers that being foragers, our hunter gatherer ancestors were constantly on the move and were want in that process to burn off if they had any, their excess food energy. This lifestyle has been eliminated in modern day society and replaced by in by and large a sedentary one, where the opportunities providing ease and convenience for getting goods and services has resulted in less and less physical activity and as such a mismatch between the energy we consume and the energy we actually need. This excess energy then, deprived of avenues for dissipation, transcribes to fat, clogged arteries, stressed organs and consequently the diseases of affluence we see today. So what then does the diet comprise? Let's look at that in detail. We have already stated that it is essentially constituted of lean meat, nuts, seeds and berries whilst eschewing grains, dairy products and refined processed foods.
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