There is evidence of a "hunger gene" or "starvation gene" that tells us to gorge when we can, because there may be no food for a week. It seems to be more stro

There is evidence of a "hunger gene" or "starvation gene" that tells us to gorge when we can, because there may be no food for a week. It seems to be more strongly expressed in some groups than in others, for example some of the native Americans who have huge obesity problems in the modern era, apparently because their systems don't know how to handle so many white carbohydrates e.g. sugar. The "thrifty gene" hypothesis: http://en.wikipedia.org/wiki/Thrifty_gene_hypothesis http://en.wikipedia.org/wiki/Thrifty_gene_hypothesis For them, it seems that meats, vegetables, fruits and native whole grains probably should be the majority of their diet, and adding sugars, processed grains, and toxins like alcohol have been disastrous.