Dietary shifting in the Nasca Region as inferred from the carbon- and nitrogen-isotope compositions of archaeological hair and bone

► Palaeodiet is investigated at Cahuachi and Huaca del Loro, Nasca Region, Peru. ► Diet and dietary shifting are reconstructed using isotopic analyses of bone and hair. ► Residential mobility is inferred based on spatial isotopic variation in food sources. ► Sequential analysis of hair reveals both seasonal diets and broader resource access.