GSTP1 and dental fluorosis: In the present study, we observed no relationship between GSTP1 Rs1695 SNP and brick-tea type of fluorosis overall, but Tibetan individuals with G allele of GSTP1 Rs1695 had a significantly decreased risk of skeletal fluorosis compared to Tibetan individuals with homozygous A allele after adjusting for age, sex, IF and fluoride exposure status.