An interesting exploratory study. More investigation along this line of thought is needed.
N Parimi, V Viswanath, B Kashyap, PU Patil. Hair as biomarker of fluoride exposure in a fluoride endemic area and a low fluoridated area. Int J Trichology. 2013 Jul;5(3):148-50. doi: 10.4103/0974-7753.125613.
AIM: The aim of the present study was to determine whether hair could be used as biomarker of fluoride exposure.
MATERIALS AND METHODS: The study was carried out on 30 people living in an endemically fluoridated area and a low fluoridated area. Samples of hair from the occipital were taken and subjected to fluoride analysis by a fluoride ion electrode.
RESULTS: Lower fluoride levels in water supplies correlated with lower levels of fluoride in hair and more over higher fluoride levels in water correlated with higher levels of fluoride in hair. A direct relationship was evident between fluoride levels in water supplies and concentration of fluoride in hair (P < 0.01).
CONCLUSIONS: The results of the present study indicate hair can be used as an indicator of fluoride exposure.