You are what you ate

摘要

It is hard to think of anyone who doesn't like starchy foods such as pasta, chips, rice or bread. But certain populations, for example hunter-gatherers living in the rainforests or near the Arctic circle, have historically existed on a diet rich in protein and low in starch. George Perry and colleagues conclude that such differences in the amount of dietary starch have mouldedthe human genome over time (G. H. Perry et al. Nature Genet. doi:10.1038g2123; 2007).