Population geneticists have detected recent strong natural selection acting on carbohydrate metabolism in Europeans and genes which facilitate ketogenesis in the meat eating peoples of the Arctic. I think it’s unlikely that something similar has not gone on in the Japanese.
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Re congitive effects: "The mood profile was improved after Omega-3 with increased vigour and reduced anger, anxiety and depression states. This was associated with an effect on reactivity with a reduction of reaction time in the Go/ No-Go and Sustained Attention tests"
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"results are confirmed by the EMG data that showed the Omega-3-related reduction of RT was not owing to peripheral effects on muscles, such as improved speed of contraction, but to decreased EMG latency, which was probably influenced by a higher efficiency of central mechanisms"
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In other words, one of the effects high omega-3 levels have is that they allow a person to make faster and more accurate decisions on tests of inhibition and executive function like Go/No-Go, which I think has applications in many kinds of real world mental tasks.
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End. Going to keep grinding these out until the lockdown ends, got something stuff coming on implications of lactose tolerance in NW Europe and an attempt to explain West African creativity.
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End of conversation
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