Bromine, a possible marine diet indicator? A hypothesis revisited

This study examines the hypothesis that bromine in human skeletal tissue serves as an indicator of marine diet. Synchrotron-based X-ray fluorescence microscopy of samples from archaeological sites on the Peruvian North Coast showed relative enrichment of bromine in the cementum and osteons. X-ray absorption spectroscopy determined organobromine to be present, suggesting an exclusive association with the organic component. We used skeletal tissue from marine mammals as a proxy for the marine diet. Bromine, when observed in these specimens, was recorded close to the detection limits; therefore, bromine in archaeological skeletal material does not appear to be an indicator of marine diet.