Correlation between minerals in hair as determined by PIXE analysis and nutrient intake conditions

This research looks at the correlation between the quantity of nutrients taken as minerals determined by PIXE analysis and mineral intake calculated in accordance with menu records collected via a total food duplicate method survey conducted on agricultural workers from four inland areas of Iwate Prefecture. Among the major nutrients and minerals taken over a 24 h period, intakes of calorie and carbohydrate of both sexes were found to be slightly high for the off-season, which indicated they had kept on a diet suited for the busy farming season. Intakes of calcium, iron and dietary fiber were also high. While 31 elements were identified from the hair samples collected from subjects, the elements found in all subjects were sulfur, calcium, iron, copper, zinc, and bromine. In many of the elements detected, a great difference between the maximum and minimum values was found. As for potassium, sodium, calcium, magnesium, phosphorus, iron, copper, of which excess or deficiency could affect health, we examined whether their element content in hair correlates with their amount taken in the body through meals. However, no clear correlation between the two, the elements in hair and meals, was found.