Meat and Nicotinamide: A Causal Role in Human Evolution, History, and Demographics.

107 , 108 Change in diet changes serotonin and other neurotransmitters directly and indirectly through altering the gut microbiome (an overall trend from Bacteroides to Prevotella enterotype on more plant-based diets) influencing cognition and mood and potentially increasing social cohesion, collectivism, and sedentism. 109 – 117 Cross infection with symbionts is an advantage when they add to the supply of nutrients of living closer together with less than perfect hygiene, but risks dysbioses.

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Indeed, the idea may not have been popular as agriculture by all accounts is harder work than being a hunter-gatherer and there are highly significant detrimental consequences for height and health. 201 – 205 Many tooth and bone infections (including tuberculosis [TB]) along with stunting show up in the palaeopathological record and are all associated with deficient animal proteins or iron deficiency – although pellagra itself has no diagnostic f

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