Nineteen workers exposed to low levels of selenium (0.047-0.202 mg/m3air) along with 15 control subjects were studied for clinical, hematological, radiological, and neurobehav-ioral variables in relation to selenium concentration in hair. The levels of selenium in the hair of exposed subjects (1.44±0.37 µg/g) were significantly higher than those of control subjects (0.78±0.18 µg/g). The levels of selenium in the hair of 22 nonvegetarian subjects were found to be significantly higher as compared to 12 vegetarian subjects. Complaints of weakness and/or fatigue were found to be more prevalent in the exposed subjects. The study holds promise that hair selenium may be used as a monitoring tool for low-level occupational exposure to selenium.