Carbon and nitrogen isotope ratios in hair sampled from 65 communities
across the central and intermountain regions of the United States and
more intensively throughout 29 [ZIP]{.caps} codes in the Salt Lake
Valley, Utah, revealed a dietary divergence related to socioeconomic
status as measured by cost of living, household income, and adjusted
gross income. Corn-fed, animal-derived proteins were more common in the
diets of lower socioeconomic status populations than were plant-derived
proteins, …
