Observations among former American residents living long-term in Peru suggested that hair health improved while in Peru. To determine if a Peruvian diet correlates with hair composition, dietary intake of nutrients and mineral con- tent of hair were measured among Peruvian and matched US residents. Selected foods from Peru were also analyzed for mineral and antioxidant content and comparedwith equivalent foods available in the USA. Statistically significant differ- ences between Peruvian and US residents’ hair were found for sodium (decreased in Peru, p=0.007) and vanadium (de- creased in Peru, p=0.03). Differences in hair composition between residencies may be explained by lower dietary sodi- um and vanadium intake among Peruvian residents or by lower concentrations of these minerals in Peruvian drinking water. Many significant mineral differences were also identi- fied between Peruvian foods and their US equivalents. Al- though no statistically significant correlations between dietary intake and hair mineral content were found, results indicate that a Peruvian diet contributes differently to hair composition than a US diet. More research is needed to elucidate the link between a Peruvian diet and specific aspects of hair health.
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