Bara för att vi har konsumerat något under en lång tid, så innebär det inte att vårt tarmsystem utvecklar sig efter det.
Köttkonsumtion är skadligt för människan, t.ex. orsakar dödsfall i hjärt- och kärlsjukdomar, men det sker först efteråt att människan har förökat sig. Så det påverkar inte evolutionen i det hänseendet.
Lyssna gärna på detta:
"Humans have evolved to eat meat and paleo-people consumed a lot of meat.
Quite the opposite is true.
Humans have no known anatomical, physiological, or genetic adaptations to meat consumption.
We have many adaptations to plant consumption.
Vitamin C is found in plants. We can’t make it ourselves such as carnivores.
Or digestive tract is longer than carnivores, so that our food can stay in the body longer so we can digest plant matter. We need more surface area and we need more microbes.
We have genera... We have bit molars there to shred fibers, plant tissue. We don’t have carnassials, the specialized teeth that carnivores have to shred meat. We do actually have some genetic mutations in some populations that are adapted to animal consumption, to milk not to meat. These arose in certain agricultural communities, primarily in Europe and Africa.
"
http://tedxtalks.ted.com/video/Debunking-the-Paleo-Diet-Christ;search%3Adebunking%20paleo
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