The measurement of dietary selenium intake in a free-living population using dietary recall techniques has been shown to be
spurious. Consequently, in our laboratory, we have focused on the development of biologic monitors such as blood, nails, hair
and urine. In this paper, we report on the neutron activation analysis of whole blood, plasma and nail specimens collected
from 285 Caucasian subjects, all permanent residents of Hawaii, participating in a malignant melanoma trial. Correlations
between monitors are presented and discussed in the context of selenium determinants and integration of selenium intake.