BACKGROUND: Carbon (δ OBJECTIVE: We examined associations between hair δ METHODS: Hair samples and 24-h dietary recalls were collected from children (aged 5.6 ± 0.2 y
n = 138) and adults (34.1 ± 0.7 y
n = 114) in a cross-sectional study in Philadelphia. Hair δ RESULTS: Among adults, regression models revealed positive associations of δ CONCLUSIONS: Age-related dietary patterns, particularly higher cow's milk consumption in children, may mask δ