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it appears to be diet afterall

 
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duaneh



Joined: 26 Feb 2011
Posts: 257
Location: west, pa, usa

PostPosted: Mon Jan 27, 2014 5:24 pm    Post subject: it appears to be diet afterall Reply with quote

hi Fintan

re your tweet "it's the wheat, stupid" Very Happy

http://news.sciencemag.org/archaeology/2014/01/how-farming-reshaped-our-genomes?rss=1

How Farming Reshaped Our Genomes

"Lalueza-Fox suggests that prehistoric hunter-gatherers got most of their vitamin D from eating lots of meat and that natural selection did not lead to the evolution of light skin until the advent of farming and diets based more on carbohydrates. Thus meat, fish, and eggs, which make up a much higher proportion of diets today than they did for early farmers, are a major source of vitamin D in modern populations, but early farmers would have been much more reliant on sunlight to help produce vitamin D in their skin. “It seems possible that latitude is not the key factor in skin depigmentation, but diet,” he says.

Another feature of the La Braña genome is more consistent with current thinking about how farming changed human biology, however. The genes involved in breaking down lactose (the key sugar in milk products) and starch (the key nutrient in domesticated plants) were in an “ancestral” form, the team reports, meaning that hunter-gatherers were not good at digesting these foods, which later became essential to farming societies."

http://www.nbcnews.com/science/dark-skin-blue-eyes-genes-paint-picture-7-000-year-2D11996418

Dark skin, blue eyes: Genes paint a picture of 7,000-year-old European

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